Columbia subject headings:
Harvard subject headings:
Education--Audio-visual aids--Congresses.
Language and languages--Study and teaching--Audio-visual aids--Congresses.
Motion pictures and literature--Congresses.
Motion pictures in education--Congresses.
Princeton subject headings:
Education--Audio-visual aids--Congresses.
Language and languages--Study and teaching--Audio-visual aids--Congresses.
Motion pictures and literature--Congresses.
Motion pictures in education--Congresses.