1. Forum on Geologic Mapping Applications in the Washington-Baltimore Urban Area : proceedings, Reston, Virginia, April 23, 1997 Author/Creator: Forum on Geologic Mapping Applications in the Washington-Baltimore Urban Area Reston, Va.) (1997 Publication/Creation: Washington : U.S. G.P.O. ; Denver, CO : Free on application to the U.S. Geological Survey, Information Services, 1997 Resource Type: Book Access & Availability: Loading
2. Frederick-Montgomery-Howard County boundary line resurvey of 1980 Author/Creator: Schwarz, Kenneth A. Publication/Creation: [Annapolis] : Dept. of Natural Resources, Maryland Geological Survey, 1985 Resource Type: Book Access & Availability: Loading