1. Arey, L. B.: Direct Proof of the Monozygotic Origin of Human Identical Twins, Anat. Rec., xxiii, 245–252.
2. The Human Yolk Sac, Science, xlvi, 77–79.
3. Two Embryologically Important Specimens of Tubal Twins (Including Critical Summaries of All Known Cases), Surg., Gynec. and Obst., in press.
4. Tubal Twins and Tubal Pregnancy, Surg., Gynec. and Obst., in press.
5. Chorionic Fusion and Augmented Twinning in the Human Tube, Anat. Rec., xxiii, 253–262.