Kammen, Michael. <br/><br/>
Spheres of liberty   : changing perceptions of liberty in American culture /  
Michael Kammen. 
 - Madison ;   London :   The University of Wisconsin Press,   1986. 
 - XIV, 191 p. :   il. ;   24 cm. 
<br/><br/> Indice. 
<br/><br/>Bibliografía. 
<br/><br/><label>ISBN: </label>0-299-10840-6