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Current edition

547 pages first pub 1989 (editions)

nonfiction science informative medium-paced
Other editions (3)
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648 pages first pub 1989 (editions)

nonfiction science informative medium-paced

656 pages first pub 1989 (editions)

nonfiction science informative medium-paced

750 pages first pub 1987 (editions)

nonfiction science informative medium-paced