TY - BOOK AU - Mackenthun,Kenneth M. TI - Toward a cleaner aquatic environment AV - TD223 .M315 U1 - 628.1/688 PY - 1973/// CY - Washington PB - U.S. Govt. Print. Off. KW - Water KW - Pollution KW - United States KW - Local KW - Water quality management N1 - Includes bibliographies ER -