Columbia subject headings:
Conceptual art--Germany--Exhibitions.
Hien, Albert--Exhibitions.
Neon lighting in art--Exhibitions.
Neon sculpture--Germany--Exhibitions.
Harvard subject headings:
Conceptual art--Germany--Exhibitions
Hien, Albert--Exhibitions.
Neon lighting in art--Exhibitions.
Neon sculpture--Germany--Exhibitions.
Princeton subject headings:
Conceptual art--Germany--Exhibitions.
Hien, Albert--Exhibitions.
Neon lighting in art--Exhibitions.
Neon sculpture--Germany--Exhibitions.