Surficial geologic map of the Sandown quadrangle, Rockingham County, New Hampshire / by Gregory D. Gephart ; design and drafting of map by Graphic Arts Section Department of Resources and Economic Development ; in cooperation with the U.S. Geological Survey-COGEOMAP Program.
- Relief shown by contours and spot heights. Includes location maps and list to geologic features. "NW/4 Haverhill 15ʹ quadrangle."
- Held by
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