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580 pages first pub 1993 (editions)

nonfiction childrens reference science informative medium-paced
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580 pages first pub 1993 (editions)

nonfiction childrens reference science informative medium-paced

missing page info first pub 1993 (editions)

nonfiction childrens reference science informative medium-paced

523 pages first pub 1993 (editions)

nonfiction childrens reference science informative medium-paced