TY - RPRT TI - Aeromagnetic map of the Peru quadrangle, Berkshire and Hampshire Counties, Massachusetts AU - Peter Popenoe AU - G. R. Boynton AU - G. L. Zandle PY - 1964 DO - 10.3133/gp455 UR - https://pubs.usgs.gov/publication/gp455 ID - gp455 ER -