Brams, Steven J. <br/><br/>
Approval voting / 
Steven J. Brams, Peter C. Fishburn. 
 - New York :  Springer,  2007 
 - xxi, 198 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references (p. 179-188) and index. 
<br/><br/><label>ISBN: </label>0387498958 9780387498959 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Voting, Plural.<br/>Voting, Plural--United States,