Roruch, Robert F. <br/><br/>
Randomized experiments for planning and evalution  Practical Guide 

 - ThousaNew Delhi Oaks  Sage Publications  1997 
 - 263p.  23 cm. 
 - Applied social research methods series .
<br/><br/><label>ISBN: </label>0803935102 
<br/><br/><label>Dewey Class. No.: </label>300.72  / BOR