Region
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Latin America
3
Latin America --
5
Libya
1
Libya --
1
Malaysia
4
Malaysia --
4
Middle East
4
Middle East --
4
Nigeria
1
Nigeria --
1
Pacific Area
1
Pacific Area --
2
Pacific area
1
Pacific area --
2
Papua New Guinea --
1
Paracel Islands --
1
Persian Gulf Region --
1
Persian Gulf region
1
Russia
1
Russia --
1
Singapore
2
Singapore --
2
Soviet Union
14
Soviet Union --
16
Spain --
1
Spratly Islands --
1
Sweden
2
Sweden --
2
Syria
1
Syria --
1
United States
46
United States --
74
United states --
3
Yugoslavia
1
Yugoslavia --
1