TY  - RPRT
TI  - Preliminary map of surficial materials in northwestern Riverside and southwestern San Bernardino counties, California
AU  - Brett F. Cox
AU  - Douglas M. Morton
PY  - 1978
DO  - 10.3133/ofr78977
UR  - https://pubs.usgs.gov/publication/ofr78977
ID  - ofr78977
ER  -