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1
Colorado, Manitou quadrangle /
[Washington, D.C.] : U.S. Geological Survey, 1921
Edition of May 1909, reprinted 1921.

Book
2
Colorado, Manitou quadrangle /
[Washington, D.C.] : U.S. Geological Survey, 1936
Edition of May 1909, reprinted 1936.

Book
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