Region
China --
79
China
55
Soviet Union --
17
Soviet Union
16
United States --
15
United States
14
Asia, Southeastern
4
Asia, Southeastern --
4
Great Britain
4
Great Britain --
4
Africa
3
Africa --
3
Albania
2
Albania --
2
Asia
2
Asia --
2
India
2
India --
2
Japan
2
Japan --
2
Russia
2
Russia --
2
Australia
1
Australia --
1
Burma
1
Burma --
1
Developing countries
1
Developing countries --
1
Indonesia
1
Indonesia --
1
Nuclear warfare
1
Taiwan --
1
Thailand
1
Thailand --
1
Tibet (China)
1
Tibet (China) --
1
Vietnam
1
Vietnam --
1