1. Earth-science information in land-use planning : guidelines for earth scientists and planners Author/Creator: William Spangle and Associates, author Publication/Creation: [Reston, Virginia] : United States Department of the Interior, Geological Survey, 1981 Resource Type: Book Access & Availability: Loading
2. Earth-science information in land-use planning : guidelines for earth scientists and planners Author/Creator: William Spangle and Associates Publication/Creation: Arlington, Va. : Branch of Distribution, U.S. Geological Survey, 1976 Resource Type: Book Access & Availability: Loading
3. Environmental geology, Allegheny County and vicinity, Pennsylvania : description of a program and its results Author/Creator: Briggs, Reginald P., 1929-2009 Publication/Creation: [Washington] : Geological Survey, 1977 Resource Type: Book Access & Availability: Loading
4. Environmental geology, Allegheny County and vicinity, Pennsylvania : description of a program and its results Author/Creator: Briggs, Reginald Peter, 1929- author Publication/Creation: [Reston, Virginia] : United States Department of the Interior, Geological Survey, 1977 Resource Type: Book Access & Availability: Loading