TY - RPRT TI - Surface breaks formed at the time of and following the Borrego Mountain, California, earthquake of April 8, 1968 AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey AU - California Institute of Technology PY - 1970 DO - 10.3133/ofr70349 UR - https://pubs.usgs.gov/publication/ofr70349 ID - ofr70349 ER -