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256 pages first pub 1997 (editions)

nonfiction history science challenging informative medium-paced
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250 pages first pub 1997 (editions)

nonfiction history science challenging informative medium-paced

250 pages first pub 1997 (editions)

nonfiction history science challenging informative medium-paced

250 pages first pub 1997 (editions)

nonfiction history science challenging informative medium-paced