Columbia subject headings:
Harvard subject headings:
Germany (East)--Armed Forces--History.
Germany (East). Nationale Volksarmee
Germany (East). Volksmarine.
Germany--History, Naval--20th century.
Warsaw Treaty
Warsaw Treaty Organization--Armed Forces.
Princeton subject headings:
Europe, Eastern--Military relations--Germany (East).
Germany (East)--Military relations--Europe, Eastern.
Germany (East). Nationale Volksarmee--History.
Germany (East). Volksmarine--History.
Warsaw Treaty Organization--Armed Forces--History.