1959. 2018-06-21T17:53:33Z. 2018-06-21T17:53:33Z. National Research Council (U.S.). Division of Earth Sciences. Geological Society of America. English. cartographic image. Public. United States and United States.
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2. Pleistocene glaciation in the upper Platte River drainage basin, Colorado [cartographic material]
1998. 2002-06-01T04:00:00Z. 2016-07-20T21:08:17Z. Geological Survey (U.S.). U.S. Geological Survey ; For sale by U.S. Geological Survey Information Services. English. cartographic image. Public. South Platte River Watershed (Colo. and Neb.), United States, and South Platte River Watershed. Pleistocene and From 10 thousand to 2 million years ago.
