Search Results       Your search for [author]Jahn, Theodore Louis, 1905- returned 1 record.           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 conc... by Jahn, Theodore Louis, 1905-; Dubuque: W. C. Brown Publishers, 1949. Subject: Protozoa.          Add to Book Cart Relevance: 27.97%