Posavac, Emil J. <br/><br/>
Program evaluation  Methods and case studies / 
Emil J. Posavac Raymond G. Carey 
 - 2nd ed 
 - New Jersey  Prentice-Hall  1985 
 - 355p.  ill.  24cm 
<br/><br/><label>ISBN: </label>0137294840 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evaluation research (social - action programs) United States