Pawson, Ray, <br/><br/>
Realistic evaluation / 
Ray Pawson and Nick Tilley. 
 - London ;  Sage,  1997. 
 - xvii, 235 p. : 
<br/><br/><label>ISBN: </label>0761950087 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evaluation research (Social action programs)---
<br/><br/><label>Dewey Class. No.: </label>001.42  / Re