O'Connor, Robert E. <br/><br/>
Politics and structure :  essentials of American national government / 
Robert E. O'Connor, Thomas G. Ingersoll, Robert F. Pecorella. 
 - 5th ed. 
 - Pacific Grove, Calif. :  Brooks/Cole,  1990. 
 - xii, 238 p. :  ill. 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>United States--Politics and government.