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172 pages first pub 1928 (editions)

nonfiction essays philosophy science adventurous reflective medium-paced
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240 pages first pub 1928 (editions)

nonfiction essays philosophy science adventurous reflective medium-paced

240 pages first pub 1928 (editions)

nonfiction essays philosophy science adventurous reflective medium-paced

289 pages first pub 1928 (editions)

nonfiction essays philosophy science adventurous reflective medium-paced

256 pages first pub 1928 (editions)

nonfiction essays philosophy science adventurous reflective medium-paced

234 pages first pub 1928 (editions)

nonfiction essays philosophy science adventurous reflective medium-paced

missing page info first pub 1928 (editions)

nonfiction essays philosophy science adventurous reflective medium-paced

192 pages first pub 1928 (editions)

nonfiction essays philosophy science adventurous reflective medium-paced

286 pages first pub 1928 (editions)

nonfiction essays philosophy science adventurous reflective medium-paced