TY  - RPRT
TI  - Preliminary geologic map of the El Cajon 30' x 60' quadrangle, Southern California
AU  - Victoria R. Todd
PY  - 2004
DO  - 10.3133/ofr20041361
UR  - https://pubs.usgs.gov/publication/ofr20041361
ID  - ofr20041361
ER  -