TY  - RPRT
TI  - Preliminary geologic map of the Clayton Quadrangle, Contra Costa County, California
AU  - T. W. Dibblee
PY  - 1980
DO  - 10.3133/ofr80547
UR  - https://pubs.usgs.gov/publication/ofr80547
ID  - ofr80547
ER  -