TY - RPRT TI - Hydrocarbon gas seeps of the convergent Hikurangi margin, North Island, New Zealand AU - K.A. Kvenvolden AU - J.R. Pettinga PY - 1989 DO - 10.1016/0264-8172(89)90071-8 UR - https://pubs.usgs.gov/publication/70015434 ID - 70015434 ER -