Columbia subject headings:
Harvard subject headings:
Art, European--20th century--Catalogs
Art--Germany--Würzburg--Catalogs.
Concrete art--Europe--Catalogs.
Museum im Kulturspeicher (Würzburg, Germany)--Catalogs.
Ruppert, Peter C.--Art collections--Catalogs.
Princeton subject headings:
Catalogs.
Concrete art--Europe--Catalogs.
Museum in Kulturspeicher (Würzburg, Germany)--Catalogs.
Ruppert, Peter C.--Art Collections--Catalogs.