Audiovisuals: some problems revisited.
D001296:Audiovisual Aids / Q000592:standards; D001634:Bibliographies as Topic; D006281:Health Occupations / Q000193:education; D008523:MEDLARS; D009317:National Library of Medicine (U.S.); D013663:Teaching / Q000379:methods; D013664:Teaching Materials; D014481:United States