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144 pages first pub 2007 (editions) user-added

nonfiction childrens science adventurous informative medium-paced
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127 pages first pub 2004 (editions)

nonfiction childrens science adventurous informative medium-paced

128 pages first pub 2004 (editions)

nonfiction childrens science adventurous informative medium-paced

127 pages first pub 2004 (editions)

nonfiction childrens science adventurous informative medium-paced