The presidency and the political system / 
Michael Nelson, editor. 
 - 8th ed. 
 - Washington, D.C. :  CQ Press,  c2006. 
 - xiv, 607 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>156802875X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Presidents--United States.
<br/><br/><label>Dewey Class. No.: </label>352.230973 PRE