How to know the Protozoa : a pictured-key for identifying the more common fresh water, marine, and parasitic Protozoa, with elementary discussions of the importance of each group and of interesting facts concerning them /
Jahn, Theodore Louis, 1905-
How to know the Protozoa : a pictured-key for identifying the more common fresh water, marine, and parasitic Protozoa, with elementary discussions of the importance of each group and of interesting facts concerning them / by Theodore Louis Jahn and Francis Floed Jahn. - Dubuque : W. C. Brown, [c1949]. - 234 p. : ill. 22 cm.
How to know the Protozoa : a pictured-key for identifying the more common fresh water, marine, and parasitic Protozoa, with elementary discussions of the importance of each group and of interesting facts concerning them / by Theodore Louis Jahn and Francis Floed Jahn. - Dubuque : W. C. Brown, [c1949]. - 234 p. : ill. 22 cm.