1991 - Dinosaur Babies [National Geographic Action Book] (Hardcover) ISBN-13: 9780870448416 ISBN-10: 0870448412 Genre: Children's Books 1 1988 - Why on Earth [Books for World Explorers] (Hardcover) ISBN-13: 9780870447068 ISBN-10: 0870447068 Genres: Children's Books, Teen & Young Adult 1 1983 - How Things Work [Books for World Explorers] (Paperback) ISBN-13: 9780870444258 ISBN-10: 0870444255 Genres: Children's Books, Science & Math ? |