Columbia subject headings:
Forced labor--Poland--History--20th century.
Forced labor--Serbia--History--20th century.
Labor policy--Poland--History--20th century.
Labor policy--Serbia--History--20th century.
Poland--History--Occupation, 1939-1945.
Serbia--History--1918-1945.
World War, 1939-1945--Conscript labor--Poland.
World War, 1939-1945--Conscript labor--Serbia.
Harvard subject headings:
Forced labor--Poland--History--20th century.
Forced labor--Serbia--History--20th century.
Labor policy--Poland--History--20th century.
Labor policy--Serbia--History--20th century.
Poland--History--Occupation, 1939-1945
Serbia--History--1918-1945.
World War, 1939-1945--Conscript labor--Poland.
World War, 1939-1945--Conscript labor--Serbia.
Princeton subject headings:
Forced labor--Poland--History--20th century.
Forced labor--Serbia--History--20th century.
Labor policy--Poland--History--20th century.
Labor policy--Serbia--History--20th century.
Poland--History--Occupation, 1939-1945.
Serbia--History--1918-1945.
World War, 1939-1945--Conscript labor--Poland.
World War, 1939-1945--Conscript labor--Serbia.