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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- Item332862 - Great Northern Railway Authorization for Expenditure (AFE) 47725, Sioux Falls, South Dakota, 1933.
- Item332863 - Great Northern Railway Authorization for Expenditure (AFE) 48061, Sioux Falls, South Dakota, 1934.
- Item332864 - Great Northern Railway Authorization for Expenditure (AFE) 49400, Sioux Falls, South Dakota, 1935.
- Item332865 - Great Northern Railway Authorization for Expenditure (AFE) 49800, Sioux Falls, South Dakota, 1935.
- Item332866 - Great Northern Railway Authorization for Expenditure (AFE) 50082, Sioux Falls, South Dakota, 1935.
- Item332867 - Great Northern Railway Authorization for Expenditure (AFE) 50158, Sioux Falls, South Dakota, 1935.
- Item332868 - Great Northern Railway Authorization for Expenditure (AFE) 50619, Sioux Falls, South Dakota, 1936.
- Item332869 - Great Northern Railway Authorization for Expenditure (AFE) 50625, Sioux Falls, South Dakota, 1936.
- Item332870 - Great Northern Railway Authorization for Expenditure (AFE) 51387, Sioux Falls, South Dakota, 1936.
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