Surficial geologic map of the Townsend quadrangle, Middlesex and Worcester counties, Massachusetts and Hillsborough County, New Hampshire / Department of the Interior, U.S. Geological Survey ; by Carl Koteff and Byron D. Stone, 1990 ; prepared in cooperation with the Commonwealth of Massachusetts, Department of Public Works [and the] State of New Hampshire, Department of Resources and Economic Development.
- Relief shown by contours and spot heights. "Geology mapped in 1966, 1972, 1982." Includes: text, illustrations, quadrangle location map, and 5 color profiles.
- Held by
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