Railroad Archives Online
- ФондовиD0063 - Walter W. Ainsworth Collection
- Серија004 - Northern Pacific Railroad Company
- Подсерија014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 006 - Cabooses (Railroads)
- ЈединицаWWANT044 - Northern Pacific freight train at Seattle, Washington, circa 1935.
- ЈединицаWWANT049 - Northern Pacific freight train at Seattle, Washington, circa 1935.
- ЈединицаWWANT079 - Northern Pacific freight train with a wood caboose at Black River, Washington, circa 1941.
- ЈединицаWWANT089 - A Northern Pacific freight train at Black River, Washington, circa 1941.
- ЈединицаWWANT091 - A Northern Pacific freight train at Black River, Washington, circa 1941.
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