TY  - RPRT
TI  - Geologic map of the outcrop area of the Hornbrook Formation, Oregon and California
AU  - Tor Helge Nilsen
AU  - G.M. Barats
AU  - M.A. Elliott
AU  - D. L. Jones
PY  - 1983
DO  - 10.3133/ofr83373
UR  - https://pubs.usgs.gov/publication/ofr83373
ID  - ofr83373
ER  -