73076695
Feb 9, 1976
Sep 12, 1978
FILMSTRIPS, FILM LOOPS, PRERECORDED CASSETTE TAPES, AND PHONOGRAPH RECORDS
Electrical and Scientific ApparatusTRANSPARENCIES, PHOTOGRAPHIC PRINTS, TEACHERS' INSTRUCTIONAL GUIDES AND CHILDREN'S EDUCATIONAL BOOKS
Paper Goods and Printed Matter