Railroad Archives Online
- CollectionD0036 - George Werkema Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3002 - Depots/Freighthouses
- 40 more...
- ItemWerkema467 - Northern Pacific Depot at Issaquah, Washington, in 1992.
- ItemWerkema471 - Northern Pacific depot at Kelso, Washington, in 1988.
- ItemWerkema472 - Northern Pacific depot at Kelso, Washington, in 1988.
- ItemWerkema473 - Northern Pacific depot at Kelso, Washington, in 1988.
- ItemWerkema474 - Northern Pacific depot at Kelso, Washington, in 1988.
- ItemWerkema475 - Northern Pacific depot at Kelso, Washington, in 1988.
- ItemWerkema476 - Northern Pacific depot at Kelso, Washington, in 1988.
- ItemWerkema477 - Northern Pacific depot at Kelso, Washington, in 1988.
- ItemWerkema478 - Northern Pacific depot at Kelso, Washington, in 1988.
- 27 more...