Surficial geology of the Ashburnham quadrangle, Hillsborough and Cheshire counties, New Hampshire / C. T. Hildreth ; mapped, edited, and published by the Geological Survey.
- Relief shown by contours and spot heights. "Control by USGS, USC&GS, and Massachusetts Geodetic Survey, and Massachusetts Harbor and Land Commission." "Topography by planetable surveys 1943 and 1944. Revised 1965." "Interior--Geological Survey, Reston, Virginia--1979." Title from accompanying booklet. Cartographer and date information taken from web page of New Hampshire state geologic publications list. Includes quadrangle location map. "N237.5-W7152.5/705. 1965. Photorevised 1979. AMS 6669 III NW-Series V814."
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