Railroad Archives Online
- CollectionD0255 - Casey Adams Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3011 - Railroad cars self-propelled
- ItemCRAGND011 - Great Northern Gas Electric Motor Car X838 In Washington in 1951
- ItemCRAGND012 - Great Northern Gas Electric Motor Car 2338 Leading Train Number 220 In North Dakota in 1949
- ItemCRAGNS323 - Great Northern Gas Motorcar 2326 at Sioux Falls, South Dakota in 1949
- ItemAdams GN - 057 R - Great Northern Gas-Electric Motorcar 2301 at Kalispel, Montana in 1946
- ItemAdams GN - 058 R - Great Northern Gas-Electric Motorcar 2311 at Grand Forks, North Dakota in 1946
- 9 more...