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240 pages first pub 1998 (editions)

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

nonfiction history science informative medium-paced

240 pages first pub 1998 (editions)

nonfiction history science informative medium-paced

257 pages first pub 1998 (editions)

nonfiction history science informative medium-paced

258 pages first pub 1998 (editions)

nonfiction history science informative medium-paced