Columbia subject headings:
Artists--Germany--Biography.
Barlach, Ernst, 1870-1938--Friends and associates.
Kollwitz, Käthe, 1867-1945--Friends and associates.
Harvard subject headings:
Barlach, Ernst, 1870-1938
Kollwitz, Käthe, 1867-1945
Princeton subject headings:
Artists--Germany--Biography.
Barlach, Ernst, 1870-1938--Friends and associates.
Kollwitz, Käthe, 1867-1945--Friends and associates.