Cook Thomas D <br/><br/>
Quasi-experimentation    Design & analysis issues for field settings. 

 - Chicago  Rand McNally College Publishing      1979 
 - xii,405p.  cm. 
<br/><br/><label>Standard No.: </label>113507 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>S:f, L9