1871. 2002-09-19T15:14:23Z. 2022-12-23T22:36:46Z. De Lacy, W. W. (Walter Washington), 1819-1892, cartographer. Engraved, printed and published by G.W. & C.B. Colton & Co., No. 172 William St. English. cartographic image. Public. Montana and Wyoming.
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1871. 2002-06-01T04:00:00Z. 2017-07-04T21:13:51Z. Geological Survey of the Territories (U.S.). Dept. of the Interior, U.S. Geological Survey of the Territories. English. Public. Idaho, Montana, and Wyoming.