TY  - BOOK
AU  - Mason, C.F.
TI  - Biology of freshwater pollution
SN  - 0582061911
U1  - 628.16809169 
PY  - 1991///, repr. 1995
CY  - New York
PB  - Longman Scientific & Technical
KW  - Water
KW  - Pollution
KW  - Environmental aspects
KW  - Freshwater biology
KW  - Water quality bioassay
N1  - Includes bibliographical references (p.295-338) and index
ER  -