Onsman, Harry Management powertools a guide to 20 of the most powerful management tools and techniques ever invented / [Book] : Harry Onsman. - Sydney : The Mcgraw-Hill companies, c2004. - ix, 284 p. : ill. ; 23 cm. All. ISBN: 9780074713457 0074713450 Subjects--Topical Terms: Management.Business management. Dewey Class. No.: 658