TY - RPRT TI - E-field ratio telluric survey near the Big Maria Mountains, Riverside County, California AU - Donald B. Hoover AU - Michael M. Broker AU - T. Stambaugh PY - 1981 DO - 10.3133/ofr81961 UR - https://pubs.usgs.gov/publication/ofr81961 ID - ofr81961 ER -