TY  - BOOK
AU  - Needham, James G; Needham, Paul R
TI  - Guide to the study of fresh-water biology
U1  - 577.6  NEE-G5 
PY  - 1967///
CY  - Holden-Day, San Francisco
KW  - Aquatic ecology-- Fresh water ecology-- Pond ecology-- Limnology
ER  -