Brams, Steven J. <br/><br/>
Approval voting. 

 - [1st ed.] 
 - Boston:  Birkhauser,  1982. 
 - 198 p. 
<br/><br/><label>ISBN: </label>3764331089 
<br/><br/><label>Dewey Class. No.: </label>324.63  / B815a