TY  - BOOK
AU  - Mason, C.F.
TI  -  Biology of freshwater pollution
SN  - 0582455960
U1  - 628.16809169 
PY  - 1981///
CY  - Harlow
PB  - Longman Scientific & Technical
KW  - Water
KW  -  Pollution
KW  -  Environmental aspects
KW  - Freshwater biology
N1  - Includes bibliographical references and indexes
ER  -