Columbia subject headings:
Harvard subject headings:
Aeronautics--Germany (East)--Safety measures.
Antiaircraft missiles--Germany (East)
Defense information, Classified--Computer networks--Security measures--Germany (East)
Germany (East). Luftstreitkräfte/Luftverteidigung. 43. Flugabwehr-Raketenbrigade "Erich Weinert."
Surface-to-air missiles--Germany (East)
Princeton subject headings:
Aeronautics--Germany (East)--Safety measures.
Antiaircraft missiles--Germany (East).
Defense information, Classified--Computer networks--Security measures--Germany (East).
Surface-to-air missiles--Germany (East).