Columbia subject headings:
Art--Conservation and restoration--Germany.
Bardenhewer, Anton, 1857-1939--Criticism and interpretation.
Harvard subject headings:
Art--Conservation and restoration--Germany.
Bardenhewer, Anton, 1857-1939--Criticism and interpretation.
Princeton subject headings:
Art--Conservation and restoration--Germany.
Bardenhewer, Anton, 1857-1939--Criticism and interpretation.