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408 pages paperback 1998

nonfiction science informative medium-paced
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missing page info 1998

nonfiction science informative medium-paced

380 pages hardcover 1998

nonfiction science informative medium-paced

304 pages hardcover 1998

nonfiction science informative medium-paced

220 pages hardcover 1998

nonfiction science informative medium-paced