Heffner, Richard D <br/><br/>
A documentary history of the United States / 
by Richard D Heffner; Alexander Heffner. 
 - 8th edition 
 - New York :  Signet Book,  2009. 
 - xiii, 667 p. ;  19 cm. 
<br/><br/><label>ISBN: </label>978-0451-22850-5 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--History--Sources