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10 hours, 10 minutes first pub 1980 (editions) user-added

nonfiction science informative reflective slow-paced
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352 pages first pub 1980 (editions)

nonfiction science informative reflective slow-paced

343 pages first pub 1980 (editions)

nonfiction science informative reflective slow-paced

343 pages first pub 1980 (editions)

nonfiction science informative reflective slow-paced

missing duration info first pub 1980 (editions)

nonfiction science informative reflective slow-paced

323 pages first pub 1980 (editions) user-added

nonfiction science informative reflective slow-paced