Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- ItemWWAPC0256 - Great Northern Railway diesel locomotive number 77 at Renton, Washington, circa 1953.
- ItemWWAPC0257 - Great Northern Railway diesel locomotive number 77 at Renton, Washington, circa 1953.
- ItemWWAPC0258 - Great Northern Railway diesel locomotive number 228 at Renton, Washington, circa 1965.
- ItemWWAPC0259 - Great Northern Railway diesel locomotive number 228 at Renton, Washington, circa 1965.
- ItemWWAPC0260 - Great Northern Railway diesel locomotive number 228 at Renton, Washington, circa 1965.
- ItemWWAPC0263 - Great Northern Railway diesel locomotive number 230 at Renton, Washington, circa 1965.
- ItemWWAPC0556 - Great Northern Railway diesel locomotive number 77 at Seattle, Washington, circa 1952.
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