Columbia subject headings:
Art--Private collections--Austria--History.
Holocaust, Jewish (1939-1945), and art.
Rieger, Heinrich, 1868-
Rieger, Heinrich, 1868---Art collections.
Harvard subject headings:
Art thefts--Austria--History--20th century.
Art, Austrian--20th century--Private collections.
Art--Private collections--Austria--History.
Holocaust, Jewish (1939-1945), and art.
Jewish property--Austria.
Leopold, Rudolf--Art collections.
Rieger, Heinrich, 1868-
Rieger, Heinrich, 1868---Art collections.
Rieger, Heinrich, 1868-1942--Art collections.
World War, 1939-1945--Confiscations and contributions--Austria.
Princeton subject headings: