Columbia subject headings:
Baltic States--Annexation to Soviet Union.
Baltic States--History--Autonomy and independence movements.
Germany--Foreign relations--1933-1945.
Germany--Foreign relations--Soviet Union.
Germany. Treaties, etc. 1939 August 23.
Soviet Union--Foreign relations--1917-1945.
Soviet Union--Foreign relations--Germany.
World War, 1939-1945--Diplomatic history.
Harvard subject headings:
Baltic States--Annexation to the Soviet Union.
Baltic States--History--Autonomy and independence movements.
Germany--Foreign relations--1933-1945.
Germany--Foreign relations--Soviet Union.
Germany. Treaties, etc. 1939 August 23.
Soviet Union--Foreign relations--1917-1945.
Soviet Union--Foreign relations--Germany.
World War, 1939-1945--Diplomatic history.
Princeton subject headings:
Baltic States--Annexation to Soviet Union.
Baltic States--History--Autonomy and independence movements.
Germany--Foreign relations--1933-1945.
Germany--Foreign relations--Soviet Union.
Germany. Treaties, etc. 1939 August 23
Soviet Union--Foreign relations--1917-1945.
Soviet Union--Foreign relations--Germany.
World War, 1939-1945--Diplomatic history.