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276 pages first pub 1978 (editions)

nonfiction history science informative medium-paced
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273 pages first pub 1978 (editions)

nonfiction history science informative medium-paced

273 pages first pub 1978 (editions)

nonfiction history science informative medium-paced

missing page info first pub 1978 (editions)

nonfiction history science informative medium-paced

missing page info first pub 1978 (editions)

nonfiction history science informative medium-paced

273 pages first pub 1978 (editions)

nonfiction history science informative medium-paced