American Association for the Advancement of Science. Section on Zoological Sciences

The beginnings of embryonic development / a symposium organized by the Section on Zoological Sciences of the American Association for the Advancement of Science, cosponsored by the American Society of Zoologists and the Association of Southeastern Biologists, and presented at the Atlanta meeting, December 27, 1955 ; edited by Albert Tyler, R.C. von Borstel, and Charles B. Metz.