Health education in the Extension Service: a historical perspective.
D000574:American Medical Association; D006077:Government Agencies; D006266:Health Education / Q000266:history*; D006285:Health Planning; D049673:History, 20th Century; D006801:Humans; D007878:Legislation as Topic; D009329:Nebraska; D010865:Pilot Projects; D012423:Rural Health / Q000266:history*; D012424:Rural Population; D012922:Social Change; D013038:Specialization; D014481:United States; D000078329:Workforce