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456 pages first pub 1980 (editions) user-added

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

nonfiction science informative inspiring reflective medium-paced

570 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

364 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

528 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

336 pages first pub 1980 (editions) user-added

nonfiction science informative inspiring reflective medium-paced

719 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

368 pages first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced

324 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

missing page info first pub 1980 (editions)

nonfiction science informative inspiring reflective medium-paced