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missing duration info first pub 1980 (editions)

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

nonfiction science informative inspiring reflective medium-paced

488 pages first pub 1980 (editions) user-added

nonfiction science informative inspiring reflective medium-paced

438 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

447 pages first pub 1980 (editions) user-added

nonfiction science informative inspiring reflective medium-paced

missing page info first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

508 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

missing page info first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

508 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

missing duration info first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

365 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced