Columbia subject headings:
Harvard subject headings:
Art students--Correspondence.
Jacob, Bruno, -1915--Correspondence.
Jewish artists--Correspondence.
World War, 1914-1918--History--Sources.
Princeton subject headings:
Artists--Germany--Correspondence.
Jacob, Bruno--Correspondence.
Jewish artists--Germany.
Soldiers--Germany--Correspondence.
World War, 1914-1918--Art and the war.
World War, 1914-1918--Participation, Jewish--Personal narratives.