Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 115 more...
- ItemWWANT147 - Northern Pacific steam locomotive 246 at Argo, Washington, circa 1925.
- ItemWWANT148 - Northern Pacific steam locomotive 246 at Seattle, Washington, circa 1925.
- ItemWWANT149 - Northern Pacific steam locomotive 252at Seattle, Washington, in 1941.
- ItemWWANT150 - Northern Pacific steam locomotive 900 at Seattle, Washington, circa 1925.
- ItemWWANT151 - Northern Pacific steam locomotive 916 at Seattle, Washington, circa 1925.
- ItemWWANT152 - Northern Pacific steam locomotive 916 at Seattle, Washington, in 1924.
- ItemWWANT153 - Northern Pacific steam locomotive 1050 at Seattle, Washington, in 1941.
- ItemWWANT154 - Northern Pacific steam locomotive 1050 at Seattle, Washington, in 1941.
- ItemWWANT155 - Northern Pacific steam locomotive 1053 in Washington, circa 1935.
- 144 more...