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447 pages first pub 1980 (editions) user-added

nonfiction science informative inspiring reflective slow-paced
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384 pages first pub 1980 (editions) user-added

nonfiction science informative inspiring reflective slow-paced

missing duration info first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced

400 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced

456 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced

361 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced

14 hours, 31 minutes first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced

439 pages first pub 1981 (editions)

nonfiction science informative inspiring reflective slow-paced

14 hours, 31 minutes first pub 1980 (editions) user-added

nonfiction science informative inspiring reflective slow-paced

508 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced

368 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced