@article {131, title = {Evaluating a groundwater supply contamination incident attributed to Marcellus Shale gas development}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {112}, year = {2015}, url = {http://www.pnas.org/content/112/20/6325.full}, author = {Garth Llewellyn and Frank Dorman and J. L. Westland and David Yoxtheimer and Paul Grieve and Todd Sowers and E. Humston-Fulmer and Susan L. Brantley} } @booklet {132, title = {Frequently asked questions about the study {\textquotedblleft}Evaluating a groundwater supply contamination incident attributed to Marcellus Shale gas development{\textquotedblright}}, year = {2015}, author = {Garth Llewellyn and Frank Dorman and David Yoxtheimer and Susan L. Brantley} }