NATIONAL GEOGRAPHIC SOCIETY

[ PRE-RECORDED MOTION PICTURE FILMS, FILMSTRIPS, AND VIDEO DISCS; COMPUTER PROGRAMS IN THE FIELD OF EDUCATION; AND EDUCATIONAL KITS FOR CLASSROOM USE COMPRISING AUDIO CASSETTES, FILMSTRIPS, TEACHERS' GUIDES, BOOKLETS, WORK SHEET * WORK SHEETS* AND PRINTED SHEET ILLUSTRATIONS ]

EDUCATIONAL BOOKS