- Development of the Nine-Banded Armadillo from the Primitive Streak Stage to Birth: With Especial Reference to the Question of Specific Polyembryony
- Readings in Evolution, Genetics, and Eugenics
- Development of the Nine-Banded Armadillo from the Primitive Streak Stage to Birth: With Especial Reference to the Question of Specific Polyembryony
- The Biology of Twins (Mammals)
- Vertebrate Zoology