Valcarce Alfayate, Enrique. <br/><br/>
Los porqués del Papa en la "Humanae Vitae." 

 - Madrid  Studium  1969. 
 - 140 p.  18cm. 
<br/><br/> Includes indexes. 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Catholic Church--Doctrines.<br/>Catholic Church Pope (1963-1978 : Paul VI) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclicals Papal.