TY  - RPRT
TI  - Geologic map of the East of Grotto Hills quadrangle, California: A digital database
AU  - Jane E. Nielson
AU  - David R. Bedford
PY  - 1999
DO  - 10.3133/ofr9935
UR  - https://pubs.usgs.gov/publication/ofr9935
ID  - ofr9935
ER  -