1. Mount Vernon and Piscataway quadrangles, geologic and environmental atlas [cartographic material]
1978. 2016-06-21T13:24:02Z. 2016-09-26T17:42:50Z. Glaser, John D. State of Md., Dept. of Natural Resources, Md. Geological Survey, Williams & Heintz Map Corp.). English. cartographic image. Public. Maryland and Piscataway Region.
