Columbia subject headings:
Harvard subject headings:
Cold War--History.
Germany (East)--Military relations--Soviet Union.
Merchant marine--Military aspects--Baltic Sea--History--20th century.
Military sealift--Baltic Sea--History--20th century.
Military sealift--Germany (East)--History.
Military sealift--Soviet Union--History.
Soviet Union--Military relations--Germany (East)
Transportation, Military--Baltic Sea--History--20th century.
Transportation, Military--Germany (East)--History.
Princeton subject headings:
Cold War.
Germany (East)--Military relations--Soviet Union.
Merchant marine--Military aspects--Baltic Sea--History--20th century.
Military sealift--Baltic Sea--History--20th century.
Military sealift--Germany (East)--History.
Military sealift--Soviet Union--History.
Soviet Union--Military relations--Germany (East).
Transportation, Military--Baltic Sea--History--20th century.
Transportation, Military--Germany (East)--History.