Nation of Nations: A Narrative History of the American /  
James West Davidson ... [et al.] 
 - 4ª edición 
 - New York :   McGraw-Hill,  2001 
 - 1 CD-ROM 
<br/><br/><label>ISBN: </label>0-07-237379-2 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Estadoa Unidos --Historia