This is Ecumenism :  Simplification of the 'decree on ecumenism' 'decree on the eastern' catholic churches' and 'declaration on the relation of the church to non-christian religious' / 

 - London :  Geoffrey Chapman,   1967.  
 - 78 p. 
<br/><br/><label>Dewey Class. No.: </label>262.0011  / THI