Columbia subject headings:
Catholic Church--Africa, Sub-Saharan--History--20th century.
Labor--Religious aspects--Christianity--Africa, Sub-Saharan--History--20th century.
Young Christian Workers--History.
Harvard subject headings:
Catholic Church--Africa--History--20th century.
Jeunesse ouvrière chrétienne (Belgium)--History--20th century.
Labor--Africa--Religious aspects--Christianity--History--20th century.
Working class--Religious life--Africa--History--20th century.
Young Christian Workers--History--20th century.
Youth--Religious life--Africa--History--20th century.
Princeton subject headings: