Columbia subject headings:
Harvard subject headings:
Catholic Church--Doctrines--Papal documents.
Catholic Church--Doctrines.
Christian sociology--Catholic Church
Christian sociology--Catholic Church--Papal documents.
Church and social problems--Catholic Church
Community development--Religious aspects--Catholic Church
Economic development--Religious aspects--Catholic Church
Princeton subject headings:
Christian sociology--Catholic Church.
Church and social problems--Catholic Church--History--20th century.
Church and social problems--Developing countries--Catholic Church.