Columbia subject headings:
Germany--Foreign economic relations--Romania.
Germany--Foreign economic relations--Yugoslavia.
Romania--Foreign economic relations--Germany.
Yugoslavia--Foreign economic relations--Germany.
Harvard subject headings:
Balkan Peninsula--Foreign economic relations--Germany
Germany--Foreign economic relations--Balkan Peninsula
Germany--Foreign relations--1933-1945.
Princeton subject headings:
Czechoslovakia--Foreign relations.
Germany--Foreign relations--1933-1945.
Little Entente
Romania--Foreign relations--1914-1944.
Yugoslavia--Foreign relations--1918-1945.