TY - RPRT TI - Geologic map of the Telegraph Peak 7.5-minute Quadrangle, San Bernardino County, California AU - Douglas M. Morton AU - Michael O. Woodburne AU - Joseph F. Foster PY - 1991 DO - 10.3133/ofr90693 UR - https://pubs.usgs.gov/publication/ofr90693 ID - ofr90693 ER -