Beard, Charles Austin  (1874-1948). <br/><br/>
The rise of American civilization.  Vol. 1,  The agricultural era / 
 Agricultural era. 
by Charles A. Beard, Mary R. Beard. 
 - New York :  Macmillan,  1927. 
 - XV, [3], 824 s. ;  22 cm. 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Stany Zjednoczone--historia.