Columbia subject headings:
Aeronautics, Military--Soviet Union.
Astronautics, Military--Soviet Union.
Soviet Union--Armed Forces.
Harvard subject headings:
Aeronautics, Military--Soviet Union
Astronautics, Military--Soviet Union.
Soviet Union--Armed Forces.
Princeton subject headings:
Aeronautics, Military--Soviet Union.
Astronautics, Military--Soviet Union.
Soviet Union--Armed Forces.