Columbia subject headings:
Poland--History--Occupation, 1939-1945.
Poland. Armia--History--World War, 1939-1945.
World War, 1939-1945--Poland.
Harvard subject headings:
Poland--History--Occupation, 1939-1945
Poland. Armia--History--World War, 1939-1945.
World War, 1939-1945--Poland.
Princeton subject headings:
Dictionaries.
Poland--History--Occupation, 1939-1945.
Poland. Armia--History--World War, 1939-1945.
World War, 1939-1945--Biography--Dictionaries.
World War, 1939-1945--Poland.