Southwick quadrangle, Massachusetts--Connecticut [cartographic material] : 7.5 minute series (topographic) / mapped, edited, and published by the Geological Survey ; Commonwealth of Massachusetts, Department of Public Works.
- Relief shown by contours and spot heights. "Contour interval 10 feet." "Topography by planetable surveys 1937-1944. Revised from aerial photographs taken 1971. Field checked 1972." Includes quadrangle location map. "N4200--W7245/7.5." "AMS 6468 III SE--Series V814."
- U.S. Geological Survey
- Held by
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