TY  - RPRT
TI  - Provenance of the upper Miocene and Pliocene Etchegoin Formation; implications for paleogeography of the late Miocene of Central California
AU  - J.A. Perkins
PY  - 1987
DO  - 10.3133/ofr87167
UR  - https://pubs.usgs.gov/publication/ofr87167
ID  - ofr87167
ER  -