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
- 804 more...
- ItemCNBk4img062 - Great Northern Railway Locomotive 188.
- ItemCNBk4img063 - Great Northern Railway Locomotive 189 at Sioux City, Iowa in 1956.
- ItemCNBk4img064 - Great Northern Railway Locomotive 191 at Fargo, North Dakota in 1970.
- ItemCNBk4img065 - Great Northern Railway Locomotive 192 at Barnesville, Minnesota in 1969.
- ItemCNBk4img066 - Great Northern Railway Locomotive 925, numbered as 987; at Seattle, Washington.
- ItemCNBk4img067 - Great Northern Railway Locomotive 190 at Minneapolis, Minnesota in 1968.
- ItemCNBk4img068 - Great Northern Railway Locomotive 194 at Devils Lake, North Dakota in 1969.
- ItemCNBk4img069 - Great Northern Railway Locomotive 925(?), NW-5; numbered as 987.