Carlen, Claudia.  <br/><br/>
The Papal Encyclicals 1903-1939 / 

 - America :  McGrath Publishing Company,   1981. 
 - xi, 566 p. 
<br/><br/><label>ISBN: </label>0843407654 084340762X 
<br/><br/><label>Dewey Class. No.: </label>262.91  / CAR