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544 pages first pub 1934 (editions)

nonfiction history philosophy technology informative slow-paced
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544 pages first pub 1934 (editions)

nonfiction history philosophy technology informative slow-paced

645 pages first pub 1934 (editions)

nonfiction history philosophy technology informative slow-paced

missing page info first pub 1934 (editions)

nonfiction history philosophy technology informative slow-paced