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35 hours, 52 minutes audio 1986 user-added

nonfiction history science challenging informative slow-paced
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886 pages paperback 1986

nonfiction history science challenging informative slow-paced

1499 pages digital 1986 user-added

nonfiction history science challenging informative slow-paced

718 pages 1986

nonfiction history science challenging informative slow-paced