?url_ver=Z39.88-2004&rft_id=doi%3A10.1016%2Fj.scitotenv.2015.02.030&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Meng%2C+Qingmin&rft.aulast=Meng&rft.aufirst=Qingmin&rft.volume=515-51&rft.date=May+2015&rft.issn=0048-9697&rft.atitle=Spatial+analysis+of+environment+and+population+at+risk+of+natural+gas+fracking+in+the+state+of+Pennsylvania%2C+USA&rft.title=Science+of+The+Total+Environment&rft.pages=198-206&rft.genre=article