Friedman, J. Ed. <br/><br/>
Evolution of social systems. 

 - New York :     Duckworth,        1977. 
 - xiv,562p. 
<br/><br/><label>ISBN: </label>0715609343 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>Y  L7