TY  - BOOK
AU  - Willoughby,L.G.
TI  - Freshwater biology
T2  - Studies in the biological sciences
SN  - 0876637217
AV  - QH96 .W53 1977
U1  - 574.52632 
PY  - 1977///, c1976
CY  - New York
PB  - Pica Press : distributed by Universe Books
KW  - Freshwater biology
KW  - Local
N1  - Includes bibliographical references and index
ER  -