York, Henry E. <br/><br/>
Political science :  a guide to reference and information source / 
Henry E. York 
 - Colorado :  Libraries Unlimited,  1990       
 - xv, 249 p. 
<br/><br/><label>ISBN: </label>0872877849 
<br/><br/><label>LC Class. No.: </label>R Z 7161 Y61p 1990