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176 pages first pub 1998 (editions)

nonfiction history science technology informative medium-paced
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256 pages first pub 1998 (editions)

nonfiction history science technology informative medium-paced

175 pages first pub 1998 (editions)

nonfiction history science technology informative medium-paced

176 pages first pub 1998 (editions)

nonfiction history science technology informative medium-paced