TY  - BOOK
AU  - Willoughby, L G
TI  - Freshwater Biology
U1  - 551.48 
PY  - 1977///
CY  - London
PB  - LOGMAN
KW  - GENERAL STACK
KW  - NATURAL SCIENCE& MATHEMATICS
KW  - EARTH SIENCE
KW  - GEOLOGY,HYDROLOGY &METEROLOGYZoology
ER  -