1. Bedrock geology of the Bristol Quadrangle, Hartford, Litchfield, and New Haven counties, Connecticut Author/Creator: Simpson, Howard E. 1874-1938, (Howard Edwin), author Publication/Creation: [Reston, Va.] : Department of the Interior, U.S. Geological Survey, 1990 Resource Type: Book Edition: Revised 1990. Access & Availability: Loading
2. Bedrock geology of the Bristol Quadrangle, Hartford, Litchfield, and New Haven counties, Connecticut Author/Creator: Simpson, Howard E. 1874-1938. (Howard Edwin) Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : For sale by the Books and Open-File Reports Section, 1990 Resource Type: Book Edition: Revised 1990. Access & Availability: Loading