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Exploring the universe

Anthea MatonJean HopkinsSuzan JohnsonDavid LaHartMaryanna Quon WarnerJill D. Wright

出版	Prentice Hall, 1997
ISBN	01342338599780134233857
URL	http://books.google.com.hk/books?id=vrRk9eaazOsC&hl=&source=gbs_api