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158 pages first pub 1997 (editions)

nonfiction childrens science informative medium-paced
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160 pages first pub 1997 (editions)

nonfiction childrens science informative medium-paced

158 pages first pub 1997 (editions)

nonfiction childrens science informative medium-paced

160 pages first pub 1997 (editions)

nonfiction childrens science informative medium-paced

169 pages first pub 1996 (editions)

nonfiction childrens science informative medium-paced

158 pages first pub 1997 (editions)

nonfiction childrens science informative medium-paced