Columbia subject headings:
Catholic Church. Pope (1878-1903 : Leo XIII). Rerum novarum.
Christian democracy--Spain--History--19th century.
Christian sociology--Catholic Church--History--19th century.
Labor--Religious aspects--Christianity--Spain--History--19th century.
Spain--Politics and government--1886-1931.
Harvard subject headings:
Catholic Church. Pope (1878-1903 : Leo XIII). Rerum novarum.
Christian democracy--Spain--History--19th century.
Christian sociology--Catholic Church--History--19th century.
Labor--Religious aspects--Christianity--Spain--History--19th century.
Spain--Politics and government--1886-1931.
Princeton subject headings:
Catholic Church. Pope (1878-1903 : Leo XIII). Rerum novarum
Christian democracy--Spain--History--19th century.
Christian sociology--Catholic Church--History--19th century.
Labor--Religious aspects--Christianity--Spain--History--19th century.
Spain--Politics and government--1886-1931.