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missing page info first pub 1943 (editions)

nonfiction biography science adventurous medium-paced
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280 pages first pub 1943 (editions)

nonfiction biography science adventurous medium-paced

304 pages first pub 1943 (editions)

nonfiction biography science adventurous medium-paced

300 pages first pub 1943 (editions)

nonfiction biography science adventurous medium-paced