Lippit, Ronald. The dynamics of planned change : a comparative study of principle s and tecniques / Ronald Lippitt, Jeanne Watson and Bruce Westley. U nder the general editorship of Willard B. Spalding. - New York : Harcourt Brace, 1958. - 312 p. ; 21 cm. Subjects--Topical Terms: Change. Dewey Class. No.: 301.245