Title: Triangles, symbols, and constraints
Subjects: World politics, Foreign relations, United states, foreign relations, 1961-1981, United states, foreign relations, soviet union, United states, foreign relations, china, Soviet union, foreign relations, united states, China, foreign relations, united states, World politics, 1955-1965, World politics, 1965-1975
Places: United States, China, Soviet Union
Time periods: 1963-1969, 1955-1965, 1965-1975