Columbia subject headings:
Lansing, Robert, 1864-1928.
Poland--History--German occupation, 1914-1918.
World War, 1914-1918--Civilian relief--Poland.
World War, 1914-1918--War work.
Harvard subject headings:
Poland--History--German occupation, 1914-1918
World War, 1914-1918--Blockades
World War, 1914-1918--Civilian relief--Poland.
World War, 1914-1918--Food supply--Poland.
Princeton subject headings: