Posavac, Emil j. <br/><br/>
Program evaluation :  methods and case studies / 
Emil J. Posavac and Raymond G. Carey. 
 - U. S. A. :  Prentice-Hall,  c1980. 
 - xviii, 350 p. ;  23 cm. 
<br/><br/>Includes bibliography: (p. 332-342) and index 
<br/><br/><label>ISBN: </label>0137296657 
<br/><br/><label>LC Class. No.: </label>H62.5.U5  / P62 1980