Frances Floed Jahn (Jahn, Frances Floed)

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  How to Know the Freshwater Crustacea/Aquatic Insects/Protozoa/Freshwater Algae
  by G. W. Prescott, Joseph F. Fitzpatrick, Frances Floed Jahn, Dennis M. Lehmkuhl, Theodore Louis Jahn, Eugene Cleveland Bovee
  Softcover, McGraw-Hill College, ISBN 0697416895 (0-697-41689-5)
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  How to Know the Protozoa
  by Theodore L. Jahn, Frances Floed Jahn, Eugene C. Bovee
  Hardcover, W. C. Brown Co, ISBN 069704758X (0-697-04758-X)