Steven E. Curtin, David C, Andreasen, and Andrew W. Staley ; prepared in cooperation with the Maryland Geological Survey (MGS) and the Power Plant Assessment Program, Maryland Department of Natural Resources
Title from title screen (viewed on July 14, 2009).
Mode of access: Internet from the USGS web site. Address as of 7/14/09: http://pubs.usgs.gov/of/2009/1086/pdf/OFR2009-1086.pdf ; current access is available via PURL.