Jahn, Theodore Louis <br/><br/>
How to know the protozoa; a pictured key for identifying the more common fresh water... / 
by Theodore Louis Jahn y Frances Floed Jahn 
 - Dubuque, Iowa :   Brown 
 - 236 p. 
<br/><br/><label>LCCN: </label>204931 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Protozoarios
<br/><br/><label>Dewey Class. No.: </label>PA 593 J3