TY  - BOOK
AU  - Jahn, Theodore Louis,
AU  - Jahn, Frances Floed.
TI  - How to know the protozoa: a pictured-key for identifying the mor e common fresh water, marine and parasitic protozoa, with elementary di scussions of the importance of each group and of interesting facts conc erning them 
U1  - 593 JAH 
PY  - 1949///
CY  - Dubuque, Ia.
PB  - W. C. Brow
KW  - Protozoa
ER  -