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
- 99 more...
- ItemWWANT130 - A Northern Pacific steam locomotive near Ellensburg, Washington, in 1937.
- ItemWWANT132 - Northern Pacific steam locomotive 58 at Seattle, Washington, in 1925.
- ItemWWANT133 - Northern Pacific steam locomotive 64 at Seattle, Washington, in 1924.
- ItemWWANT134 - Northern Pacific steam locomotive 64 at Seattle, Washington, circa 1925.
- ItemWWANT135 - Northern Pacific steam locomotive 76 at Seattle, Washington, circa 1925.
- ItemWWANT136 - Northern Pacific steam locomotive 76 at Seattle, Washington, circa 1925.
- ItemWWANT137 - Northern Pacific steam locomotive 76 at Seattle, Washington, circa 1925.
- ItemWWANT138 - Northern Pacific steam locomotive 76 at Seattle, Washington, circa 1925.
- ItemWWANT139 - Northern Pacific steam locomotive 212 leads a passenger train at Seattle, Washington, circa 1925.
- 160 more...