3675779
9788424119614
With a clever question-and-answer format, realistic and detailed illustrations of concepts, and topic-related organization of material, this 20-volume reference is highly informative and entertaining.Barbara Taylor is the author of 'Las Cremalleras Tienen Dientes: Y Otras Preguntas Sobre Inventos (I Wonder Why Series) (Spanish Edition)', published 1997 under ISBN 9788424119614 and ISBN 8424119614.
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