Columbia subject headings:
Harvard subject headings:
Eifel (Germany)--History--20th century.
Express highways--Germany--Eifel--History--20th century.
Forced labor--Germany--Eifel--History--20th century.
Roads--Germany--Eifel--Design and construction--History--20th century.
World War, 1939-1945--Conscript labor--Germany--Eifel.
World War, 1939-1945--Germany--Eifel.
Princeton subject headings:
Eifel (Germany)--History--20th century.
Express highways--Germany--Eifel--History--20th century.
Forced labor--Germany--Eifel--History--20th century.
Roads--Germany--Eifel--Design and construction--History--20th century.
World War, 1939-1945--Conscript labor--Germany--Eifel.
World War, 1939-1945--Germany--Eifel.