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1216 pages first pub 2011 (editions)

nonfiction science informative slow-paced
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1168 pages first pub 2011 (editions)

nonfiction science informative slow-paced

1038 pages first pub 2011 (editions)

nonfiction science informative slow-paced

1184 pages first pub 2011 (editions)

nonfiction science informative slow-paced