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175 pages first pub 1982 (editions)

nonfiction biography science informative slow-paced
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176 pages first pub 1982 (editions)

nonfiction biography science informative slow-paced

176 pages first pub 1982 (editions)

nonfiction biography science informative slow-paced

176 pages first pub 1982 (editions)

nonfiction biography science informative slow-paced

176 pages first pub 1982 (editions)

nonfiction biography science informative slow-paced