TY - RPRT TI - Preliminary photointerpretation maps of landslide and other surficial deposits of 56 7 1/2-minute quadrangles in the southeastern San Francisco Bay region, Alameda, Contra Costa, and Santa Clara counties, California AU - Tor Helge Nilsen AU - J. A. Bartow AU - V. A. Frizzell AU - J.D. Sims PY - 1975 DO - 10.3133/ofr75277 UR - https://pubs.usgs.gov/publication/ofr75277 ID - ofr75277 ER -