Encyclical letter of His Holiness Pius XI 
by divine providence Pope ... on Christian marriage, in view of the present conditions, needs, errors and vices that affect the family and society. 
 - Washington, D. C.  National Catholic Welfare Conference  1931. 
 - 47 p.  19 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Catholic Church--Discipline.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marriage.<br/>Limitación de nacimientos<br/>Matrimonio (Derecho Canonico)<br/>Iglesia Catolica--Disciplina.<br/>Birth control<br/>Marriage.<br/>Marriage (Canon law)