?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=https%3A%2F%2Fpure.iiasa.ac.at%2Fid%2Feprint%2F4965%2F&rft.title=The+Changing+Approach+to+Water-Quality+Management+in+the+United+States&rft.creator=Shanahan%2C+P.&rft.publisher=WP-96-062&rft.date=1996-06&rft.type=Monograph&rft.type=NonPeerReviewed&rft.format=text&rft.language=en&rft.identifier=https%3A%2F%2Fpure.iiasa.ac.at%2Fid%2Feprint%2F4965%2F1%2FWP-96-062.pdf&rft.identifier=++Shanahan%2C+P.+%3Chttps%3A%2F%2Fpure.iiasa.ac.at%2Fview%2Fiiasa%2F2377.html%3E++(1996).++The+Changing+Approach+to+Water-Quality+Management+in+the+United+States.+++IIASA+Working+Paper.+IIASA%2C+Laxenburg%2C+Austria%3A+WP-96-062+++++