Comentarios a la Mater et magistra : sobre el creciente desarrollo... 
by a group of Catholic authors 
 - Madrid  Biblioteca de Autores Cristianos  1966 
 - 64 p. 
<br/><br/> Text of encyclical in Spanish and Latin. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Church and social problems.--Catholic Church.