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Discover science: grade 4

Michael R. Cohen

出版	Glenview, Ill. : Scott, Foresman, 1989
ISBN	06734206479780673420640
URL	http://books.google.com.hk/books?id=ggGAsZ5p3egC&hl=&source=gbs_api

註釋

Science content helps develop the skills needed to understand how science works, learn new concepts, solve problems, and make decisions in today's technological society.