Railroad Archives Online
- CollectionD0288 - Terence Wahl Collection
- Series002 - Chicago, Milwaukee, St. Paul, and Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3006 - Cabooses (Railroads)
- ItemTRWahl0021 - Milwaukee Road Caboose, Bellingham, Washington, August 1952
- ItemTRWahl0259 - Milwaukee Road Caboose 01384, Bellingham, Washington, undated
- ItemTRWahl0260 - Milwaukee Road Caboose 01384, Bellingham, Washington, undated
- ItemTRWahl0398 - Milwaukee Road Caboose 01609, Bellingham, Washington, undated
- ItemTRWahl0399 - Milwaukee Road Caboose 01609, Bellingham, Washington, undated
- ItemTRWahl0574 - Milwaukee Road Caboose 0831, Bellingham, Washington, undated
- ItemTRWahl0575 - Milwaukee Road Caboose 01402, Bellingham, Washington, undated
- ItemTRWahl0623 - Milwaukee Road Caboose X915760, Seattle, Washington, undated
- 6 more...