title: A new look at Spemann's organizer.
authors.affiliation: Department of Biology, University of Rochester, New York 14627.
authors.forename: J F
authors.initials: JF
authors.lastname: Holtfreter
mesh_terms: D000818:Animals; D004626:Embryology / Q000266:history*; D004627:Embryonic Induction / Q000502:physiology; D005314:Embryonic and Fetal Development / Q000502:physiology*; D005775:Gastrula / Q000637:transplantation; D005855:Germ Layers / Q000637:transplantation; D005858:Germany; D049673:History, 20th Century; D014319:Triturus / Q000196:embryology