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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- Item424144 - Great Northern Railway Authorization for Expenditure (AFE) 31743, Watertown, South Dakota, 1926.
- Item424145 - Great Northern Railway Authorization for Expenditure (AFE) 32336, Watertown, South Dakota, 1926.
- Item424146 - Great Northern Railway Authorization for Expenditure (AFE) 32453, Watertown, South Dakota, 1926.
- Item424147 - Great Northern Railway Authorization for Expenditure (AFE) 32812, Watertown, South Dakota, 1926.
- Item424148 - Great Northern Railway Authorization for Expenditure (AFE) 32812, Level Siding, South Dakota, 1926.
- Item424149 - Great Northern Railway Authorization for Expenditure (AFE) 34087, Watertown, South Dakota, 1927.
- Item424150 - Great Northern Railway Authorization for Expenditure (AFE) 34241, Watertown, South Dakota, 1927.
- Item424151 - Great Northern Railway Authorization for Expenditure (AFE) 34720, Watertown, South Dakota, 1927.
- Item424152 - Great Northern Railway Authorization for Expenditure (AFE) 39275, Watertown, South Dakota, 1928.
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