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137 pages first pub 1959 (editions)

nonfiction history philosophy science challenging informative reflective slow-paced
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1 hour, 23 minutes first pub 1959 (editions) user-added

nonfiction art education philosophy science medium-paced

132 pages first pub 1959 (editions)

nonfiction art education philosophy science medium-paced

68 pages missing pub info (editions)

nonfiction art education philosophy science medium-paced