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304 pages first pub 2001 (editions)

nonfiction science challenging informative fast-paced
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288 pages first pub 2001 (editions)

nonfiction science challenging informative fast-paced

205 pages first pub 2001 (editions) user-added

nonfiction science challenging informative fast-paced

285 pages first pub 2001 (editions)

nonfiction science challenging informative fast-paced