Columbia subject headings:
Constance, Lake, Region--In art.
Heckel, Erich, 1883-1970.
Harvard subject headings:
Princeton subject headings:
Constance, Lake, Region--In art.
Heckel, Erich, 1883-1970--Criticism and interpretation.
Landscape painting, German--Constance, Lake, Region.
Landscape painting--20th century.
Watercolor painting, German--Constance, Lake, Region.
Watercolor painting--20th century.