TY - RPRT TI - Isostatic residual gravity map of the Santa Ana 1:100,000 scale quadrangle, California AU - Victoria E. Langenheim AU - R. H. Chapman AU - R. F. Sikora AU - D. A. Ponce AU - E.T. Dixon PY - 1991 DO - 10.3133/ofr91555 UR - https://pubs.usgs.gov/publication/ofr91555 ID - ofr91555 ER -