| | Northern Pacific Rwy Co. Seniority Roster | Tacoma Division Telegraphers | 1/1/1916 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1931 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1932 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1933 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1942 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1943 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1946 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1947 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1948 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1950 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1951 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1963 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1967 | | |
| | The Order of Railroad Telegraphers, Northern Pacific Railway, System Division No. 54 | Northern Pacific Railway, Minnsota and International Railway and Big Fork and International Falls Railway, Camas Prairie Railroad | 1/1/1968 | | |
| | International Association of Machinists and Aerospace Workers | Northern Pacific Rocky Mountain Division | 5/24/1905 | | |
| | Brotherhood of Railway, Airline, Steamship and Clerks Union | Paradise MT Tie Plant | 1954-1975 | | |
| | Big 5 Railroad Roster, 1937 J.A. Cheatham, Publisher | Rocky Mountain and Former Montana divisions | 4/20/1905 | | With Warren McGee notes |
| | Statement of Doubtful Cases under Agreement with Brotherhood of Railway Clerks re rule No 49 | NP Yellowstone, Montana, Rocky Mountain, Idaho divisions | 4/3/1905 | | |
| | Northern Pacific Rwy Co. Rocky Mountain Division Office of Master Mechanic | List of Engineers Qualified to handle certain trains, locomotives | 7/1/1930 | | |
| | Northern Pacific Rwy Co. Seniority Roster | Cascade Division | 1/1/1961 | | |
| | Big 5 Railroad Record, Spokane Terminal, Green Hughes Ptg. Co., Spokane | Conductors, Brakemen, Engineers, Firemen and Yardmen | 0/0/1936 | | |
| | Allen Printers Time Book seniority roster, Missoula area | Rocky Mountain Division conductors, brakemen, engineers, firemen and yardmen | 0/0/1961 | | With Bill Lynn notes. Reflects BN merger and formation of Montana Rail Link. |
| | Northern Pacific Rwy Co. roster | Idaho Division engineers, firemen | 7/1/1921 | | |
| | Northern Pacific Rwy Co. Office of Division Superintendent of Rocky Mountain Division | Conductors in service RM Div west of Helena and Butte | 7/1/1951 | | |
| | Newspapers | Various | Various | | |
| | Northern Pacific Rwy Co. roster | Seattle & Puget Sound Division engineers | 7/1/1918 | | |
| | Northern Pacific Rwy Co. roster | Engineers Seniority List, Tacoma, Seattle District | 7/1/1937 | | |
| | Northern Pacific Rwy Co. roster | Engineers Seniority List, Tacoma, Seattle District | 1/1/1939 | | |
| | Northern Pacific Rwy Co. roster | Engineers Seniority List, Tacoma, Seattle District | 1/1/1942 | | |
| | Northern Pacific Rwy Co. roster | Engineers Seniority List, Tacoma, Seattle District | 7/1/1944 | | |
| | Northern Pacific Rwy Co. roster | Engineers Seniority List, Tacoma, Seattle District | 7/1/1948 | | |
| | Northern Pacific Rwy Co. roster | Engineers Seniority List, Tacoma, Seattle District | 7/1/1950 | | |
| | Northern Pacific Rwy Co. roster | Engineers Seniority List, Tacoma, Seattle District | 7/1/1953 | | |
| | Big 4 Railroad Record, Dec. 1920, E. J. Elbury, publisher | Conductors, Brakemen, Engineers, Firemen and Yardmen for Everett, Bellingham, Sedro-Woolley, Leavenworth, Skykomish, Anacortes WA. | 12/00/1920 | | |
| | Northern Pacific Rwy Co. Seniority List of Car Department Employes at Everett Washington | At Everett WA | 1/1/1937 | | |
| | Northern Pacific Rwy Co. Seniority List of Locomotive Department Employes | At Everett WA | 1/1/1937 | | |
| | Northern Pacific Rwy Co. Seniority Rosters | Master Mechanic - Tacoma Division | 1/1/1962 | | |
| | Old Montana Division by P. B. “Brick” Marvin | Senority List | 6/2/1905 | | |
| | Brotherhood of Railway, Airline, Steamship and Clerks Union | Paradise MT | 1/1/1958 | | |
| | Northern Pacific Rwy Co. Mechanical Dept. File No. B332-23 | Minnesota Division | 4/29/1910 | | |
| | Northern Pacific Rwy Co. Mechanical Dept. File No. B390 | Lake Superior Division | 1/1/1928 | | |
| | Northern Pacific Rwy Co. Northern Pacific Rwy Co. Mech. Dept. Seniority Roster 1929 | St. Paul General Office Seniority Lists A & B | 1/1/1930 | | |
| | R. L. Polk City Directory | Missoula, Montana | 1/1/1938 | | |
| | R. L. Polk City Directory | Billings, Montana | 1/1/1930 | | |
| | R. L. Polk City Directory | Butte, Montana | 1/1/1939 | | |
| | R. L. Polk City Directory | Jamestown, North Dakota | 1/1/1942-43 | | |
| | R. L. Polk City Directory | Duluth, Minnesota | 1/1/1939 | | |
| | R. L. Polk City Directory | Livingston, Montana | 1/1/1937 | | |
| | R. L. Polk City Directory | Livingston, Montana | 1/1/1946 | | |
| | R. L. Polk City Directory | Ellensburg, Washington | 1/1/1931 | | |
| | R. L. Polk City Directory | Ellensburg, Washington | 1/1/1952 | | |
| | R. L. Polk City Directory | Brainerd, Minnesota | 1/1/1939 | | |
| | R. L. Polk City Directory | Lewiston, Idaho | 1/1/1908 | | |
| | R. L. Polk City Directory | Kootenai, Bonner, Shoshone, Benewah and Boundary Counties, Idaho | 1/1/1916-17 | | |
| | R. L. Polk City Directory | Tacoma, Washington | 1/1/1940 | | |
| | Northern Pacific Rwy Co. Chief Engineers Office File 5127-A | Seniority Lists A & B | 1/23/1939 | | |
| | R. L. Polk City Directory | Missoula, Montana | 1/1/1905 | | Outlying areas only |
| | R. L. Polk City Directory | Missoula, Montana | 1/1/1915 | | Outlying areas only |
| | R. L. Polk City Directory | Missoula, Montana | 1/1/1929 | | Outlying areas only |
| | R. L. Polk City Directory | Bozeman, Montana | 1/1/1902 | | Outlying areas only |
| | Keiter City Directory | Jamestown, North Dakota | 1/1/1912 | | Outlying areas only |
| | Keiter City Directory | Dickinson, North Dakota | 1/1/1910 | | Outlying areas only |
| | Keiter City Directory | Mandan, North Dakota | 1/1/1912 | | Outlying areas only |
| | John H Ley City Directory | St. Cloud, Minnesota | 1/1/1912 | | |
| | R. L. Polk City Directory | Yakima, Washington | 1/1/1910 | | Outlying areas only |
| | R. L. Polk City Directory | Missoula, Montana | 01/1/1901 | | Outlying areas only |
| | Pettibone City Directory | Valley City, North Dakota | 1/1/1927 | | Outlying areas only |
| | Northern Pacific Railway Co. Personnel Files | System Wide | 1890-1963 | | Original files often include physical descriptions and signatures |
| | Railway Employees Official Time and Seniority Book, 1928, H. J. Dahl, Publisher | Tacoma, Washington | 1928 | | |
| | Big 4 Railroad Record, 1926, E. J. Elbury, Publisher | Pasco, Washington | 1926 | | |
