Rossi, Peter Henry,  1921- <br/><br/>
Evaluation :  a systematic approach / 
Peter H. Rossi, Howard E. Freeman ; with the collaboration of Sonia Rosenbaum. 
 - 2a ed. 
 - Beverly Hills, EUA :  Sage Publications,  1982. 
 - 351 p. 
<br/><br/><label>ISBN: </label>0803917848 
<br/><br/><label>Encabezamiento--Tema: </label><br/>INVESTIGACION EVALUATIVA