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502 pages first pub 1994 (editions)

nonfiction science challenging informative slow-paced
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359 pages first pub 1994 (editions) user-added

nonfiction science challenging informative slow-paced

432 pages first pub 1994 (editions)

nonfiction science challenging informative slow-paced

660 pages first pub 1994 (editions) user-added

nonfiction science challenging informative slow-paced

359 pages first pub 1994 (editions) user-added

nonfiction science challenging informative slow-paced

324 pages first pub 1994 (editions)

nonfiction science challenging informative slow-paced

526 pages first pub 1994 (editions)

nonfiction science challenging informative slow-paced

444 pages first pub 1994 (editions) user-added

nonfiction science challenging informative slow-paced

359 pages first pub 1994 (editions)

nonfiction science challenging informative slow-paced