TY - RPRT TI - Influence of rainfall and ancient landslide deposits on recent landslides (1950-71) in urban areas of Contra Costa County, California AU - Tor Helge Nilsen AU - Barbara L. Turner PY - 1975 DO - 10.3133/b1388 UR - https://pubs.usgs.gov/publication/b1388 ID - b1388 ER -