Railroad Archives Online
- ArkivD0288 - Terence Wahl Collection
- Serie002 - Chicago, Milwaukee, St. Paul, and Pacific Railroad Company
- Underserie014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 006 - Cabooses (Railroads)
- ObjektTRWahl0021 - Milwaukee Road Caboose, Bellingham, Washington, August 1952
- ObjektTRWahl0259 - Milwaukee Road Caboose 01384, Bellingham, Washington, undated
- ObjektTRWahl0260 - Milwaukee Road Caboose 01384, Bellingham, Washington, undated
- ObjektTRWahl0398 - Milwaukee Road Caboose 01609, Bellingham, Washington, undated
- ObjektTRWahl0399 - Milwaukee Road Caboose 01609, Bellingham, Washington, undated
- 9 mer...