TY - RPRT TI - Preliminary geologic map and cross-section of the Clear Lake volcanic field, Lake County, California AU - B. C. Hearn AU - J.M. Donnelly AU - Fraser E. Goff PY - 1976 DO - 10.3133/ofr76751 UR - https://pubs.usgs.gov/publication/ofr76751 ID - ofr76751 ER -