Railroad Archives Online
- FondD0027 - Timothy Miller Collection
- Sorozat004 - Northern Pacific Railroad Company
- Alsorozat009 - Engineering Records
- 008 - Physical plant drawing
- 003 - Maintenance Facilities
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- IratdarabStruc005292 - Northern Pacific Engineering Drawing, Diesel Oil Storage and Pumping Facilities at Walla Walla, Washington, 1950
- IratdarabStruc005293 - Northern Pacific Engineering Drawing, Unnamed Structure at Walla Walla, Washington, 1950
- IratdarabStruc005294 - Northern Pacific Engineering Drawing, Engine House at Walla Walla, Washington, 1950
- IratdarabStruc005295 - Northern Pacific Engineering Drawing, Engine House at Walla Walla, Washington, 1950
- IratdarabStruc005296 - Northern Pacific Engineering Drawing, Engine House at Walla Walla, Washington, 1950
- IratdarabStruc005297 - Northern Pacific Engineering Drawing, Engine House at Walla Walla, Washington, 1963
- IratdarabStruc005298 - Northern Pacific Engineering Drawing, Engine House at Walla Walla, Washington, 1950
- IratdarabStruc005300 - Northern Pacific Engineering Drawing, Water Facilities at Eureka, Washington, 1966
- IratdarabStruc005311 - Northern Pacific Engineering Drawing, Sanitary Toilet at Car Repair Track and Septic Tank with New Sewer for Depot at Olympia, Washington, 1955
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