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Book, 1991
Current format, Book, 1991, 1st ed., All copies in use.
Book, 1991
Current format, Book, 1991, 1st ed., All copies in use. Offered in 0 more formats
Brief life stories of twenty-seven persons whose inventions or discoveries have altered the environment to a marked degree. Includes a list of important dates in the history of invention and technology.
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