Railroad Archives Online
- CollectionD0153 - Doug Wingfield Collection
- Series010 - Other Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- ItemWingfield.144 - Lake Superior Terminal & Transfer Diesel Locomotive 101 at Superior, Wisconsin, 1961
- ItemWingfield.145 - Lake Superior Terminal & Transfer Diesel Locomotive 105 at Superior, Wisconsin, 1961