Sandown quadrangle, New Hampshire--Rockingham Co. [cartographic material] : 7.5 minute series (topographic) / mapped, edited and published by the United States Geological Survey.
Relief shown by contours and spot heights. "NW/4 Haverhill 15' quadrangle. 42071-H2-TF-024." "Topography by photogrammetric methods from aerial photographs taken 1975. Field checked 1977. Map edited 1981." "Control by USGS, NOS/NOAA, and New Hampshire Geodetic Survey." "DMA 6769 I NW--Series V812." Includes quadrangle location map.
- United States Geological Survey ;
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