Railroad Archives Online
- FondD0027 - Timothy Miller Collection
- Sorozat004 - Northern Pacific Railroad Company
- Alsorozat009 - Engineering Records
- 008 - Physical plant drawing
- 002 - Depots and Freighthouses
- IratdarabStruc000027 - Northern Pacific Engineering Drawing, Yardmaster Tower (also Duluth, Minnesota) at Pasco, Washington, 1969
- IratdarabStruc000028 - Northern Pacific Engineering Drawing, Yardmaster Tower (also Duluth, Minnesota) at Pasco, Washington, 1969
- IratdarabStruc000029 - Northern Pacific Engineering Drawing, Yardmaster Tower (also Duluth, Minnesota) at Pasco, Washington, 1969
- IratdarabStruc000030 - Northern Pacific Engineering Drawing, Yardmaster Tower (also Duluth, Minnesota) at Pasco, Washington, 1969
- IratdarabStruc000031 - Northern Pacific Engineering Drawing, Yardmaster Tower (also Duluth, Minnesota) at Pasco, Washington, 1969
- IratdarabStruc000032 - Northern Pacific Engineering Drawing, Yardmaster Tower at Pasco, Washington, 1972
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