Columbia subject headings:
Artist couples--Germany--Biography.
Marc, Franz, 1880-1916--Exhibitions.
Marc, Maria, 1876-1955--Exhibitions.
Harvard subject headings:
Artist couples--Germany--Biography.
Blaue Reiter (Group of artists)--Exhibitions.
Marc, Franz, 1880-1916--Exhibitions.
Marc, Maria, 1876-1955--Exhibitions.
Princeton subject headings: