TY - RPRT TI - Preliminary map showing recently active breaks along the Maacama fault zone between Hopland and Laytonville, Mendocino County, California AU - Earl Haig Pampeyan AU - Philip W. Harsh AU - J.M. Coakley PY - 1980 DO - 10.3133/ofr80662 UR - https://pubs.usgs.gov/publication/ofr80662 ID - ofr80662 ER -