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523 pages first pub 1949 (editions)

nonfiction history science adventurous slow-paced
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363 pages first pub 1949 (editions)

nonfiction history science adventurous slow-paced

297 pages first pub 1949 (editions) user-added

nonfiction history science adventurous slow-paced

494 pages first pub 1949 (editions) user-added

nonfiction history science adventurous slow-paced

475 pages first pub 1949 (editions)

nonfiction history science adventurous slow-paced