Qualitative and quantitative social research : papers in honor of Paul F. Lazarsfeld / edited by Robert K. Merton, James S. Coleman, Peter H. Rossi. - Merton, Robert K. (1910-2003); Coleman, James Samuel (1926-1995); Rossi, Peter Henry (1921-2006) (The Free Press a Division of Macmillan Publishing Co., Inc. ; Collier Macmillan Publishers, 1979)