1. Bedrock geologic map of the Grafton quadrangle, Worcester County, Massachusetts Author/Creator: Walsh, Gregory J. Publication/Creation: [Reston, Va.] : U.S. Geological Survey ; Denver, Colo. : For sale by U.S. Geological Survey, Information Services, 2011 Resource Type: Map Access & Availability: Loading
2. Bedrock geologic map of the Grafton quadrangle, Worcester County, Massachusetts Author/Creator: Walsh, Gregory J. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2011 Resource Type: Map Access & Availability: Loading
3. Bedrock geologic map of the Nashua south quadrangle, Hillsborough County, New Hampshire and Middlesex County, Massachusetts Author/Creator: Walsh, Gregory J., cartographer Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 2013 Resource Type: Map Access & Availability: Loading
4. Bedrock geologic map of the Uxbridge quadrangle, Worcester County Massachusetts, and Providence County, Rhode Island Author/Creator: Walsh, Gregory J., cartographer Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2014 Resource Type: Map Access & Availability: Loading
5. Bedrock geologic map of the Worcester South quadrangle, Worcester County Massachusetts Author/Creator: Walsh, Gregory J., cartographer Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2015 Resource Type: Map Access & Availability: Loading