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1056 pages first pub 1978 (editions)

nonfiction science informative medium-paced
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1264 pages first pub 1978 (editions)

nonfiction science informative medium-paced

1280 pages first pub 1978 (editions)

nonfiction science informative medium-paced

1087 pages first pub 1978 (editions)

nonfiction science informative medium-paced

missing page info first pub 1978 (editions) user-added

nonfiction science informative medium-paced

1264 pages first pub 1978 (editions)

nonfiction science informative medium-paced