1986. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Branch of Distribution. English. Public. Wyoming. Cretaceous.
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2. Geologic and biostratigraphic map of the Pierre Shale in the Colorado Springs-Pueblo area, Colorado
1986. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Branch of Distribution. English. Public. Colorado. Cretaceous.
1994. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Montana, Beaverhead County, and Pioneer Mountains. Cretaceous.
1987. 2008-09-04T13:47:56Z. 2011-03-25T21:38:24Z. Moore, Walter L., 1916-. North Dakata Geological Survey. English. Public. North Dakota. Cretaceous.
1982. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Open-File Services Section, Western Distribution Branch, USGS. English. Public. Montana. Cretaceous.
1982. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Open-File Services Section, Western Distribution Branch, USGS. English. Public. Montana. Cretaceous.
1982. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Open-File Services Section, Western Distribution Branch, USGS. English. Public. Montana. Cretaceous.
1982. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by the Open-File Services Section, Western Distribution Branch, USGS. English. Public. Montana. Cretaceous.
1991. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Powder River Basin (Wyo. and Mont.). Cretaceous.
1982. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Open-File Services Section, Western Distribution Branch, USGS. English. Public. Montana. Cretaceous.