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192 pages first pub 2002 (editions)

nonfiction childrens mathematics science funny informative lighthearted medium-paced
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192 pages first pub 2002 (editions)

nonfiction childrens mathematics science funny informative lighthearted medium-paced

missing page info first pub 2002 (editions)

nonfiction childrens mathematics science funny informative lighthearted medium-paced