TY - RPRT TI - Origin of methane and sources of high concentrations in Los Angeles groundwater AU - Justin T. Kulongoski AU - Peter B. McMahon AU - Michael Land AU - Michael T. Wright AU - Theodore Johnson AU - Matthew K. Landon PY - 2018 DO - 10.1002/2017jg004026 UR - https://pubs.usgs.gov/publication/70197806 ID - 70197806 ER -