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226 pages first pub 1982 (editions)

nonfiction mathematics mysterious medium-paced
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226 pages first pub 1982 (editions)

nonfiction mathematics mysterious medium-paced

228 pages first pub 1982 (editions)

nonfiction mathematics adventurous challenging medium-paced

269 pages first pub 1982 (editions)

nonfiction mathematics adventurous challenging medium-paced

missing page info first pub 1982 (editions)

nonfiction mathematics mysterious medium-paced