title: Physicians in family practice 1931-67.
mesh_terms: D005194:Family Practice; D006176:Gynecology; D007388:Internal Medicine; D009774:Obstetrics; D010372:Pediatrics; D010820:Physicians / Q000600:supply & distribution*; D011153:Population; D011364:Professional Practice; D014481:United States; D000078329:Workforce