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Start Over Year 1921 Publisher Geological Survey (Washington, D.C) Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. State of South Dakota

Maps University Of Minnesota Public content
1921. Geological Survey (U.S.). Compiled in 1920 and 1921.; "North American datum, 1921." 81 x 127 centimeters Scale 1:500,000 General Map Collection. Geological Survey (Washington, D.C).

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