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21. Wind energy conversion systems :   Publication: Springfield ,VA. : U.S. Department of Commerce National Technical Information Service, 1973 . ix,258 p. : , Sponsored by the National Science Foundation,Research Applied to National Needs and the National Aeronautics and Space Administration Date:1973 Availability: Copies available: Turkeyen Campus Social Sciences [TK1541 W55] (1), Actions: Add to cart No cover image available No cover image available