title: Memoir of John Perry Hubbard, 1903-1990.
authors.forename: E J
authors.initials: EJ
authors.lastname: Levit
mesh_terms: D002309:Cardiology / Q000266:history; D049673:History, 20th Century; D010372:Pediatrics / Q000266:history; D015143:Philadelphia; D012955:Societies, Medical / Q000266:history; D013044:Specialty Boards / Q000266:history