TY - BOOK AU - Katz,Elihu AU - Lazarsfeld,Paul F. ED - Columbia University. TI - Personal influence T2 - Foundations of communications research PY - 1955///] CY - Glencoe, Ill. PB - Free Press KW - Opinioni publik KW - Mediat masive N1 - Foreword : f. XV-XX; "A report of the Bureau of Applied Social Research, Columbia University."; Bibliography: p. 381-393 ER -