Columbia subject headings:
Harvard subject headings:
Cold War
Ellsworth Air Force Base (S.D.)
Historic sites--Conservation and restoration--South Dakota--Planning.
Intercontinental ballistic missile bases--South Dakota.
Minuteman (Missile)
Princeton subject headings:
Ellsworth Air Force Base (S.D.)
Historic sites--South Dakota--Conservation and restoration--Planning.
Intercontinental ballistic missile bases--South Dakota.
Minuteman (Missile)