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missing duration info first pub 2009 (editions)

nonfiction science challenging informative slow-paced
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249 pages first pub 2009 (editions)

nonfiction science challenging informative slow-paced

249 pages first pub 2009 (editions)

nonfiction science challenging informative slow-paced

265 pages first pub 2009 (editions)

nonfiction science challenging informative slow-paced

249 pages first pub 2009 (editions)

nonfiction science challenging informative slow-paced

249 pages first pub 2009 (editions)

nonfiction science challenging informative slow-paced

missing duration info first pub 2009 (editions)

nonfiction science challenging informative slow-paced

265 pages first pub 2009 (editions)

nonfiction science challenging informative slow-paced

255 pages first pub 2009 (editions) user-added

nonfiction science challenging informative slow-paced

240 pages first pub 2009 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 2009 (editions)

nonfiction science challenging informative slow-paced