TY - RPRT TI - Geochemical and isotopic variations in shallow groundwater in areas of the Fayetteville Shale development, north-central Arkansas AU - Nathaniel R. Warner AU - Timothy M. Kresse AU - Phillip D. Hays AU - Adrian Down AU - Jonathan D. Karr AU - R.B. Jackson AU - Avner Vengosh PY - 2013 DO - 10.1016/j.apgeochem.2013.04.013 UR - https://pubs.usgs.gov/publication/70155203 ID - 70155203 ER -