Ferdinand Drucker, Peter 1909-2005 Innovation and entrepreneurship : practice and principles / Peter Ferdinand Drucker - New York : Harper Business , 1986 - 277 p. : 20 cm - Perennial library . ISBN: 9780060851132 0060851139 Subjects--Topical Terms: Pequeña empresa--Estados Unidos. LC Class. No.: HD 2346 / F347i 1986 Dewey Class. No.: 658.42