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96 pages first pub 1978 (editions)

nonfiction biography childrens science adventurous slow-paced
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96 pages first pub 1978 (editions)

nonfiction biography childrens science adventurous slow-paced

96 pages first pub 1978 (editions)

nonfiction biography childrens science adventurous slow-paced

96 pages first pub 1978 (editions)

nonfiction biography childrens science adventurous slow-paced

79 pages first pub 1978 (editions)

nonfiction biography childrens science adventurous slow-paced