Columbia subject headings:
Art--Censorship--History--19th century.
Art--Censorship--History--20th century.
Law and art--History--19th century.
Law and art--History--20th century.
Photography, Artistic.
Photography--History--19th century.
Photography--History--20th century.
Harvard subject headings:
Art--Censorship--History--19th century.
Art--Censorship--History--20th century.
Law and art--History--19th century.
Law and art--History--20th century.
Photography, Artistic.
Photography--History--19th century.
Photography--History--20th century
Princeton subject headings:
Art--Censorship--History--19th century.
Art--Censorship--History--20th century.
Law and art--History--19th century.
Law and art--History--20th century.
Photography, Artistic.
Photography--History--19th century.
Photography--History--20th century.