1. Bedrock geologic map of the anthracite-bearing strata in the northwestern part of the Wilkes-Barre east quadrangle, Pennsylvania [cartographic material] Yale Public content 1973. 2012-12-10T20:49:26Z. 2013-03-18T22:30:59Z. Bergin, M. J. (Marion Joseph), 1927-. Interior--Geological Survey. English. Public. Pennsylvania and Luzerne County.