Evaluation : a systematic approach / Peter H. Rossi, Howard E. Freeman and Sonia R. Wright. Rossi, Peter H. (Peter Henry), 1921-2006. Freeman, Howard E. joint author. Rosenbaum, Sonia joint author. Evaluation research (Social action programs) H62 .R666 300.7 19 ROE Includes index. Bibliography: p. 311-325. Beverly Hills, London : Sage Publications, c1979. c1979. 1979 Text 336 p. : eng