Carlen, Claudia. <br/><br/>
The Papal Encyclicals 1903-1939 / 
Claudia Carlen. 
 - United States of America :  Mcgrath Publishing Company;  1981. 
 - 566 p. ; 
<br/><br/> includes index and biblioraphy 
<br/><br/><label>ISBN: </label>084340762X (HB)   
<br/><br/><label>Dewey Class. No.: </label>G13  / C192