Columbia subject headings:
Kollwitz, Käthe, 1867-1945--Catalogs.
Harvard subject headings:
Etching--Germany--20th century.
Kollwitz, Käthe, 1867-1945
Lithography--Germany--20th century.
Prints--Germany--20th century.
Wood-engraving, German--20th century.
Princeton subject headings:
Catalogs.
Kollwitz, Käthe, 1867-1945--Catalogs.