THE EXPANDING AUDIO-VISUAL SCENE.
D001296:Audiovisual Aids; D003146:Communications Media; D003729:Dental Care; D006266:Health Education; D006267:Health Education, Dental; D006801:Humans; D009040:Motion Pictures; D009970:Orthodontics; D014481:United States
AUDIO-VISUAL AIDS; HEALTH EDUCATION, DENTAL; MOTION PICTURES; ORTHODONTICS; UNITED STATES