Railroad Archives Online
- FondD0027 - Timothy Miller Collection
- Sorozat004 - Northern Pacific Railroad Company
- Alsorozat009 - Engineering Records
- 008 - Physical plant drawing
- 007 - Track
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- IratdarabStruc005646 - Northern Pacific Engineering Drawing, Load Adjuster and Car Puller at Missoula, Montana, 1967
- IratdarabStruc005647 - Northern Pacific Engineering Drawing, Load Adjuster and Car Puller at Missoula, Montana, undated
- IratdarabStruc005648 - Northern Pacific Engineering Drawing, Load Adjuster and Car Puller at Missoula, Montana, 1968
- IratdarabStruc006005 - Northern Pacific Engineering Drawing, Oregon Western Railroad Crossing To 6Th Avenue at Spokane, Washington, 1933
- IratdarabStruc006678 - Northern Pacific Engineering Drawing, Interlocking Control Building at Tacoma, Washington, 1963
- IratdarabStruc006679 - Northern Pacific Engineering Drawing, Interlocking Control Building at Tacoma, Washington, 1963
- IratdarabStruc006680 - Northern Pacific Engineering Drawing, Interlocking Control Building at Tacoma, Washington, 1963
- IratdarabStruc006763 - Northern Pacific Engineering Drawing, Load Adjuster and Car Puller at Parkwater, Washington, 1960
- IratdarabStruc006764 - Northern Pacific Engineering Drawing, Load Adjuster and Car Puller at Parkwater, Washington, 1962
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