?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Millock&rft.aufirst=Katrin&rft.issue=1&rft.volume=5&rft.date=2005&rft.atitle=Nonpoint+Source+Pollution+When+Polluters+Might+Cooperate&rft.title=Contributions+to+Economic+Analysis+and+Policy&rft.genre=article