TY  - BOOK
AU  - Willoughby, L.G.
TI  - Freshwater Biology
SN  - 0071254310
U1  - 574.52632 
PY  - 1976///
CY  - London
PB  - Hutcjinson Of London
KW  - Life sciences
KW  - Pure Sciences
KW  - Freshwater ecology
ER  -