Practical Zoology, by Robert W. Hegner ...
College Zoology, By Robert W. Hegner
College Zoology (By> Robert W. Hegner (And> Karl A. Stiles
Germ-Cell Cycle In Animals
Hegner's Invertebrate Nomenclature
Laboratory Guide for College Zoology, By Robert W. Hegner
Parasitology, with Special Reference to Man and Domesticated Animals
Host-parasite Relations Between Man and His Intestinal Protozoa, by Robert Hegner ...
Practical Zoology
Problems and Methods of Research in Protozoology ... Edited by Robert Hegner ... and Justin Andrews ...
Diagnosis of Protozoa and Worms Parasitic in Man
Parasitology, With Special Reference to Man and Domesticated Animals, by Robert Hegner (And Others).
Animal Parasitology, With Special Reference to Man and Domesticated Animals, by Robert Hegner, Francis M. Root, and Donald L. Augustine