Author: Patterson, E. D. (Elmer Davisson) / Subject: Geology - Yale University Library GeoBlacklight Search Results

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1. Geologic and coal-bed map of Clarion County, Pennsylvania

1972. 2012-11-16T19:36:37Z. 2012-11-16T19:36:37Z. Patterson, E. D. (Elmer Davisson). U.S. Geological Survey. English. Public. Pennsylvania and Clarion County.

2. Geologic map of the Montaqua quadrangle, Carbon and Stillwater Counties, Montana [cartographic material]

1966. 2012-01-17T18:40:39Z. 2012-03-05T17:33:56Z. Patterson, E. D. (Elmer Davisson). The Survey. English. Public. Montana, Carbon County, and Stillwater County.

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