Railroad Archives Online
- ArquivoE0045 - Great Northern Railway Authority for Expenditure Collection
- Série003 - Great Northern Railway Company (U.S.)
- Subsérie002 - Authorization for Expenditure
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- Item429730 - Great Northern Railway Authorization for Expenditure (AFE) 95576, Montana, 1955.
- Item429731 - Great Northern Railway Authorization for Expenditure (AFE) 36291, Iron, Montana, 1928.
- Item429732 - Great Northern Railway Authorization for Expenditure (AFE) 36392, Sieben, Montana, 1928.
- Item429733 - Great Northern Railway Authorization for Expenditure (AFE) 9875, Montana, 1919.
- Item429734 - Great Northern Railway Authorization for Expenditure (AFE) 12622, Montana, 1919.
- Item429735 - Great Northern Railway Authorization for Expenditure (AFE) 12420, Montana, 1920.
- Item429736 - Great Northern Railway Authorization for Expenditure (AFE) 12833, Montana, 1920.
- Item429737 - Great Northern Railway Authorization for Expenditure (AFE) 16925, Judith Gap, Montana, 1921.
- Item429738 - Great Northern Railway Authorization for Expenditure (AFE) 50403, Sieben, Montana, 1935.
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