TY - BOOK AU - Mason,C.F. TI - Biology of freshwater pollution SN - 0582061911 AV - QH545.W3 M37 1991 U1 - 363.73 20 PY - 1994/// CY - Harlow, Essex, England, New York PB - Longman Scientific & Technical, Wiley KW - Water KW - Freshwater biology N1 - Includes bibliographical references and indexes ER -