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368 pages first pub 1996 (editions)

nonfiction science challenging informative medium-paced
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383 pages first pub 1996 (editions)

nonfiction science challenging informative medium-paced

448 pages first pub 1996 (editions)

nonfiction science challenging informative medium-paced

328 pages first pub 1996 (editions)

nonfiction science challenging informative medium-paced

missing duration info first pub 1996 (editions)

nonfiction science challenging informative medium-paced

288 pages first pub 1996 (editions)

nonfiction science challenging informative medium-paced

missing duration info first pub 1996 (editions)

nonfiction science challenging informative medium-paced
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