title: The causal analysis of development in the past half century: a personal history.
authors.affiliation: Albert Einstein College of Medicine, Bronx, NY 10461.
authors.forename: S G
authors.initials: SG
authors.lastname: Waelsch
mesh_terms: D000818:Animals; D004626:Embryology / Q000266:history*; D004627:Embryonic Induction; D005823:Genetics / Q000266:history; D049673:History, 20th Century; D008967:Molecular Biology / Q000266:history