TY - RPRT TI - Seismic refraction studies of the Imperial Valley region, California— Profile models, a traveltime contour map, and a gravity model AU - Gary S. Fuis AU - W. D. Mooney AU - J. H. Healy AU - G. A. McMechan AU - W. J. Lutter PY - 1981 DO - 10.3133/ofr81270 UR - https://pubs.usgs.gov/publication/ofr81270 ID - ofr81270 ER -