Railroad Archives Online
- CollectionE0298 - Cordell Newby Photograph Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- 722 more...
- ItemCNBk3img047 - Great Northern Railway 506 at Minneapolis, Minnesota in 1969.
- ItemCNBk3img048 - Great Northern Railway 507 at St. Paul, Minnesota in 1967.
- ItemCNBk3img049 - Great Northern Railway 508 at St. Paul, Minnesota in 1967.
- ItemCNBk3img050 - Great Northern Railway 508 at St. Paul, Minnesota in 1963.
- ItemCNBk3img051 - Great Northern Railway 509 at St. Paul, Minnesota in 1969.
- ItemCNBk3img052 - Great Northern Railway 510 at St. Paul, Minnesota in 1969.
- ItemCNBk3img053 - Great Northern Railway 510 at St. Paul, Minnesota in 1969.
- ItemCNBk3img054 - Great Northern Railway 511 at St. Paul, Minnesota in 1969.
- ItemCNBk3img055 - Great Northern Railway 512
- 81 more...