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204 pages paperback 1965

nonfiction science challenging informative medium-paced
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272 pages hardcover 1965

nonfiction science challenging informative medium-paced

222 pages paperback 1965

nonfiction science challenging informative medium-paced

missing page info hardcover 1965

nonfiction science challenging informative medium-paced

222 pages paperback 1965 user-added

nonfiction science challenging informative medium-paced