HOW INSECTS DEVELOP. See
ABOUT INSECTS.
HOW LEVEL IS SEA LEVEL? Encyclopaedia Britannica Educational Corp. 13 min., sd., color, 16 mm. © Encyclopaedia Britannica Educational Corp.; 24Apr70; MP20520.
HOW ORGANIZATION RENEWAL WORKS. See
ORGANIZATION RENEWAL.
HOW PLYMOUTH TOPS CHEVROLET FOR 1970 (Filmstrip) Chrysler Corp. Made by Ross Roy, Inc. 64 fr., color, 35 mm. © Chrysler Corp.; 19Nov69; JP11886.
HOW QUIET HELPS. See
GETTING ALONG IN SCHOOL.
HOW RADIO AND TELEVISION WORK. See
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