Geography
United States
247 results
Great Britain
43 results
Texas
36 results
Developing countries
31 results
Soviet Union
29 results
Tanzania
28 results
Nigeria
27 results
Sahel
25 results
Pakistan
18 results
China
17 results
Egypt
17 results
Europe
16 results
Japan
14 results
Kenya
14 results
Southern States
14 results
Cuba
13 results
Ireland
13 results
Mexico
13 results
Côte d'Ivoire
12 results
Ghana
12 results
Philippines
12 results
France
11 results
Chad
10 results
Latin America
10 results
Libya
10 results
Niger
10 results
Russia (Federation)
10 results
Africa
9 results
Caribbean Area
9 results
Peru
9 results
Zambia
9 results
Colombia
8 results
England
8 results
Ethiopia
8 results
Sierra Leone
8 results
Africa, West
7 results
Brazil
7 results
Burkina Faso
7 results
European Economic Community countries
7 results
Malaysia
7 results
Senegal
7 results
Tunisia
7 results
West Indies
7 results
West Indies, British
7 results
Alaska
6 results
Cameroon
6 results
Europe, Eastern
6 results
India
6 results
Indonesia
6 results
New Mexico
6 results
more…