Columbia subject headings:
Harvard subject headings:
Art, Modern--20th century--Soviet Union.
Art, Russian.
Art--Private collections--Soviet Union.
Artists--Soviet Union--Biography.
Avant-garde (Aesthetics)--Soviet Union.
Costakis, Georgi--Art collections.
Princeton subject headings:
Art, Modern--20th century--Soviet Union.
Art, Russian.
Art--Private collections--Soviet Union.
Artists--Soviet Union--Biography.
Avant-garde (Aesthetics)--Soviet Union.
Costakis, Georgi--Art collections.