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1056 pages first pub 1982 (editions)

nonfiction science challenging informative medium-paced
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1408 pages first pub 1982 (editions)

nonfiction science challenging informative medium-paced

1296 pages first pub 1982 (editions)

nonfiction science challenging informative medium-paced

missing page info first pub 1982 (editions)

nonfiction science challenging informative medium-paced

928 pages first pub 1982 (editions)

nonfiction science challenging informative medium-paced

1408 pages first pub 1982 (editions)

nonfiction science challenging informative medium-paced

missing page info first pub 1982 (editions)

nonfiction science challenging informative medium-paced

missing page info first pub 1982 (editions)

nonfiction science challenging informative medium-paced

924 pages first pub 1990 (editions)

nonfiction science challenging informative medium-paced

1288 pages first pub 1982 (editions)

nonfiction science challenging informative medium-paced

1632 pages first pub 1982 (editions)

nonfiction science challenging informative medium-paced