TY - RPRT TI - Chart showing concentration and isotopic composition of hydrocarbon gases from selected springs and seeps of the northern California coast ranges AU - T.D. Lorenson AU - Leslie B. Magoon AU - Keith A. Kvenvolden PY - 1995 DO - 10.3133/ofr95671 UR - https://pubs.usgs.gov/publication/ofr95671 ID - ofr95671 ER -