TY  - BOOK
AU  - Needham, James G
AU  - Needham, Paul R
TI  - A guide to the study of freshwater biology
U1  - 574.929 
PY  - 1962///
CY  - San Francisco
PB  - Holden-Day
KW  - Freshwater biology
N1  - Contents: Pt.1.Aids to recognition of freshwater algae, invertebrates and fishes- Pt.2.Methods of sampling and analyzing aquatic organisms and their environments
ER  -