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14 hours, 41 minutes audio 1986

nonfiction science informative reflective slow-paced
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332 pages paperback 1986 user-added

nonfiction science informative reflective slow-paced

368 pages digital 1986

nonfiction science informative reflective slow-paced

14 hours, 40 minutes audio 1986 user-added

nonfiction science informative reflective slow-paced

491 pages digital 1986 user-added

nonfiction science informative reflective slow-paced