Railroad Archives Online
- CollectionD0288 - Terence Wahl Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- 13 more...
- ItemTRWahl0699 - Northern Pacific Diesel Locomotive 259, Bellingham, Washington, undated
- ItemTRWahl0700 - Northern Pacific Diesel Locomotive 259, Bellingham, Washington, undated
- ItemTRWahl0701 - Northern Pacific Diesel Locomotive 259, Bellingham, Washington, undated
- ItemTRWahl0705 - Northern Pacific Diesel Locomotive 259, Bellingham, Washington, undated
- ItemTRWahl0706 - Northern Pacific Diesel Locomotive 259, Bellingham, Washington, undated
- ItemTRWahl0710 - Northern Pacific Diesel Locomotive 259, Bellingham, Washington, undated
- ItemTRWahl0712 - Northern Pacific Diesel Locomotive 259, Bellingham, Washington, undated
- ItemTRWahl0720 - Northern Pacific Diesel Locomotive 247, Bellingham, Washington, undated
- ItemTRWahl0721 - Northern Pacific Diesel Locomotive 247, Bellingham, Washington, undated
- 7 more...