Railroad Archives Online
- 宗卷D0011 - James M. Fredrickson Collection
- 系列008 - Union Pacific Railroad Company
- 次系列014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 011 - Railroad Cars Self-propelled
- 物件JMF13-05830.0 - Oregon Railroad and Navigation (Union Pacific Railroad) motor car number 1 at Dayton, Washington, undated.