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290 pages first pub 1999 (editions)

nonfiction science challenging informative slow-paced
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314 pages first pub 1999 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1999 (editions)

nonfiction science challenging informative slow-paced

206 pages first pub 1999 (editions)

nonfiction science challenging informative slow-paced

320 pages first pub 1999 (editions)

nonfiction science challenging informative slow-paced