Region
United States
28
Great Britain
10
Iraq
6
Middle East
5
Near East
5
Arab countries
4
China
3
Iran
3
Developing countries
2
Indonesia
2
Nigeria
2
North Sea
2
Southeast Asia
2
Venezuela
2
Afghanistan
1
Africa
1
Africa, Sub-Saharan
1
Alberta
1
Algeria
1
Asia, Central
1
Canada
1
Canvey Island
1
Canvey Island, Eng
1
Caribbean Area
1
Communist countries
1
England
1
Equatorial Guinea
1
Europe
1
Europe, Western
1
France
1
Grangemouth
1
Kuwait (State)
1
Latin America
1
Libya
1
Mediterranean region
1
Mexico
1
Mexico, Gulf of
1
Middle east
1
Persian Gulf Region
1
Qatar
1
Rhodesia, Southern
1
Russia (Federation)
1
Saudi Arabia
1
Scotland
1
Soviet Union
1
Texas
1
Thurrock, Eng. (District)
1
Trinidad
1
Trinidad and Tobago
1
Tropics
1
more ...