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missing duration info first pub 1980 (editions)

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

nonfiction science informative inspiring reflective slow-paced

336 pages first pub 1980 (editions) user-added

nonfiction science informative inspiring reflective slow-paced

528 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced

719 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

missing duration info first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced

324 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced

456 pages first pub 1981 (editions) user-added

nonfiction science

438 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective slow-paced

447 pages first pub 1980 (editions) user-added

nonfiction science informative inspiring reflective slow-paced