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The Big Idea: Scientists Who Changed the World

96 pages 1998

nonfiction informative reflective medium-paced

96 pages 1998

nonfiction biography history challenging informative medium-paced

107 pages paperback 1997

nonfiction science challenging informative medium-paced

96 pages 1999

nonfiction informative reflective medium-paced

96 pages 1997

nonfiction biography philosophy science challenging informative medium-paced