TY  - BOOK
AU  - Edwards, R. W.
AU  - Garrod, D. J.
TI  - Conservation and productivity of natural waters
T2  - Symposia of the zoological society of London
SN  - 0126133298
U1  - 574.92 
PY  - 1972///
CY  - London
PB  - Academic press
KW  -  Zoology
ER  -