Hess H.Ober, ed. <br/><br/>
The Nature of human society A S ymposium on the bicentennial of the United States of America 
Hess H.Ober, ed. 
 - Philadelphia  Fortress Press           1976 
 - ix,292p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Yp7312,N76, L6