Columbia subject headings:
Harvard subject headings:
Catholic literature--History and criticism.
Christian sociology in literature.
Christian sociology--Catholic Church--History.
Church and social problems--Catholic Church--History
Seewald, Richard, 1889-1976--Religion.
Princeton subject headings:
Christian socialism--Germany--History--20th century.
Church renewal--Catholic Church.
Seewald, Richard, 1889-1976--Political and social views.