TY  - BOOK
AU  - Bick,Hartmut
TI  - Ciliated protozoa: an illustrated guide to the species used as biological indicators in freshwater biology
AV  - QL368.A22 B5
U1  - 593.172 19
PY  - 1972///
CY  - Geneva
PB  - World Health Organization
KW  - Ciliata
KW  - Identification
KW  - Indicators (Biology)
ER  -