Robert William Hegner

• College zoology
• Invertebrate zoology
• Parasitology
• Practical Zoology
• Problems and Methods of Research in Protozoology
• Big fleas have little fleas
• Directions for Laboratory and Field Work in Zoology - for Use in Connection with Practical Zoology
• Directions for laboratory and field work in zoology,
• Germ-Cell Cycle in Animals
• Introduction to Zoology
• Parade of the animal kingdom