Tufte, Edward R. <br/><br/>
Data analysis for politics and policy / 
by Edward R Tufte 
 - USA :  Prentice hall,  1974. 
 - 179 p. 
<br/><br/><label>ISBN: </label>0131975412 
<br/><br/><label>Dewey Class. No.: </label>300.72  / TUF.D