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Planet Omicron

Julie Ferris

出版	Kingfisher, 2000
ISBN	07534044519780753404454
URL	http://books.google.com.hk/books?id=jYWzAAAACAAJ&hl=&source=gbs_api

註釋

Help Zeno the Martian solve the mathematical puzzles that he encounters on his visit to Planet Omicron. Suggested level: primary.