Advances in program theory / 
editor : Leonard Bickman 
 - San Francisco :  Jossey-Bass,  1990 
 - 124 p. ;  23 cm. 
 - New directions for program evaluation ;  47 .
<br/><br/><label>ISBN: </label>1555428134 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evaluation research (Social action programs)