,  <br/><br/>
Acta Apostolicae Sedis   Commentarium Officiale:- Vol.21 to Vol.30 

 - Romae  Typis Polyglottis Vaticanis  1929 
 - 827p 
<br/><br/> includes index and biblioraphy 
<br/><br/><label>ISBN: </label> 0 
<br/><br/><label>Dewey Class. No.: </label>G11.1  / AC810