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408 pages first pub 1976 (editions)

nonfiction science challenging informative reflective slow-paced
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360 pages first pub 1976 (editions)

nonfiction science challenging informative reflective slow-paced

16 hours, 12 minutes first pub 1976 (editions)

nonfiction science challenging informative reflective slow-paced

464 pages first pub 1976 (editions)

nonfiction science challenging informative reflective slow-paced

540 pages first pub 1976 (editions)

nonfiction science challenging informative reflective slow-paced

352 pages first pub 1976 (editions)

nonfiction science challenging informative reflective slow-paced

16 hours, 12 minutes first pub 1976 (editions)

nonfiction science challenging informative reflective slow-paced

496 pages first pub 1976 (editions) user-added

nonfiction science challenging informative reflective slow-paced

missing duration info first pub 1976 (editions)

nonfiction science challenging informative reflective slow-paced

360 pages first pub 1976 (editions)

nonfiction science challenging informative reflective slow-paced

416 pages first pub 1976 (editions) user-added

nonfiction science challenging informative reflective slow-paced