TY  - BOOK
T1  - Ciliated protozoa : an illustrated guide to the species used as biological indicators in freshwater biology
A1  - Bick, Hartmut.
LA  - English
PP  - Geneva
PB  - World Health Organization
YR  - 1972
UL  - http://discoverylib.upm.edu.my/discovery/Record/82742
OP  - 198
CN  - QL368.A22B5
KW  - Ciliata : Indentification.
KW  - Indicators (Biology).
ER  -