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Current edition

192 pages 1979

nonfiction science challenging informative slow-paced
Other editions (6)
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164 pages hardcover 1979

nonfiction science challenging informative slow-paced

254 pages paperback 1979

nonfiction science challenging informative slow-paced

254 pages paperback 1979

nonfiction science challenging informative slow-paced

254 pages paperback 1979

nonfiction science challenging informative slow-paced

192 pages paperback 1979

nonfiction science challenging informative slow-paced

154 pages paperback 1979 user-added

nonfiction science challenging informative slow-paced