Railroad Archives Online
- CollectionE0045 - Great Northern Railway Authority for Expenditure Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1002 - Authorization for Expenditure
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- Item338651 - Great Northern Railway Authorization for Expenditure (AFE) 25691, Spion Kop, Montana, 1924.
- Item338652 - Great Northern Railway Authorization for Expenditure (AFE) 29697, Spion Kop, Montana, 1925.
- Item338653 - Great Northern Railway Authorization for Expenditure (AFE) 43259, Spion Kop, Montana, 1930.
- Item338654 - Great Northern Railway Authorization for Expenditure (AFE) 43373, Spion Kop, Montana, 1930.
- Item338655 - Great Northern Railway Authorization for Expenditure (AFE) 5863, Samish, Washington, 1917.
- Item338656 - Great Northern Railway Authorization for Expenditure (AFE) 24613, Samish, Washington, 1923.
- Item338657 - Great Northern Railway Authorization for Expenditure (AFE) 36753, 1928.
- Item338658 - Great Northern Railway Authorization for Expenditure (AFE) 37247, Butte, Montana, 1928.
- Item338659 - Great Northern Railway Authorization for Expenditure (AFE) 44052, Helena, Montana, 1931.
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