Columbia subject headings:
Wacker, Nicolas, 1897-1987--Catalogs.
Wacker, Nicolas, 1897-1987--Criticism and interpretation.
Harvard subject headings:
Wacker, Nicolas, 1897-1987--Catalogs.
Wacker, Nicolas, 1897-1987--Criticism and interpretation.
Wacker, Nicolas, 1897-1987.
Princeton subject headings:
Catalogs.
Wacker, Nicolas, 1897-1987--Catalogs.
Wacker, Nicolas, 1897-1987--Criticism and interpretation.