Railroad Archives Online
- CollectionD0288 - Terence Wahl Collection
- Series010 - Other Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- ItemTRWahl0550 - Olympic Portland Cement Company Diesel Locomotive 103, Bellingham, Washington, undated
- ItemTRWahl0551 - Olympic Portland Cement Company Diesel Locomotive 103, Bellingham, Washington, undated
- ItemTRWahl0552 - Olympic Portland Cement Company Diesel Locomotive 103, Bellingham, Washington, undated
- ItemTRWahl0553 - Olympic Portland Cement Company Diesel Locomotive 103, Bellingham, Washington, undated
- ItemTRWahl1020 - Olympic Portland Cement Company Diesel Locomotive 103, Bellingham, Washington, undated
- ItemTRWahl1045 - Puget Sound & Baker River Diesel Locomotive 95, Hamilton, Washington, undated
- ItemTRWahl1047 - Puget Sound & Baker River Diesel Locomotive 95, Hamilton, Washington, undated