TY - RPRT TI - Bouguer gravity map of the Portland 1° x 2° quadrangle, Maine and New Hampshire AU - Wallace A. Bothner AU - R.W. Simpson AU - R.P. Kucks PY - 1979 DO - 10.3133/ofr79872 UR - https://pubs.usgs.gov/publication/ofr79872 ID - ofr79872 ER -