Validity issues in evaluative research / 
edited by Ilene N. Bernstein. 
 - Beverly Hills, Calif. :  Sage Publications,  1976, c1975. 
 - 134 p. :  graphs ;  22 cm. 
 - Sage contemporary social science issues ; 23 .
<br/><br/> "Originally appeared as a special issue of Sociological methods & research (volume 4, number 1, August 1975)." 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0803905815 
<br/><br/><label>LCCN: </label>75032373  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evaluation research (Social action programs)
<br/><br/><label>LC Class. No.: </label>H62  / .V27 1976 
<br/><br/><label>Dewey Class. No.: </label>001.4