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64 pages first pub 2006 (editions)

nonfiction art mathematics science challenging informative slow-paced
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58 pages first pub 2006 (editions)

nonfiction art mathematics science challenging informative slow-paced

64 pages first pub 2006 (editions)

nonfiction art mathematics science challenging informative slow-paced

58 pages first pub 2006 (editions)

nonfiction art mathematics science challenging informative slow-paced

58 pages first pub 2006 (editions)

nonfiction art mathematics science challenging informative slow-paced