TY - RPRT TI - Geologic map of the Valley Mountain 15’ quadrangle, San Bernardino and Riverside Counties, California AU - Keith A. Howard AU - John Bacheller AU - Todd T. Fitzgibbon AU - Robert E. Powell AU - Charlotte M. Allen PY - 2013 DO - 10.3133/gq1767 UR - https://pubs.usgs.gov/publication/gq1767 ID - gq1767 ER -