TY - RPRT TI - Isostatic residual gravity map of the Borrego Valley 1:100,000 quadrangle, California AU - Victoria E. Langenheim AU - Robert C. Jachens PY - 1993 DO - 10.3133/ofr93246 UR - https://pubs.usgs.gov/publication/ofr93246 ID - ofr93246 ER -