00478nam a2200133Ia 45000010006000000050017000060080041000230200015000640820017000792450102000962600047001983000028002456500071002731532120261006004655.0120911s9999    xx            000 0 und d  a0250403390  a363.7394 ENV  aEnvironmental impact of nonpoint source pollution / edited by Michael ROvercash, James MDavidson.  aAnn Arbor, Mich: Ann Arbor Science, c1980.  axii, 449 p: ill; 24 cm.  aNonpoint source pollution Nonpoint source pollution--United States