Gray John <br/><br/>
Social system   A treatise on the principle of exch    

 - London  Longman            1831 
 - xvi,374p  cm. 
<br/><br/> Reprinted: Augustus M Kelley, 1973 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X, A