Geography
United States
956 results
Soviet Union
184 results
Developing countries
161 results
China
144 results
Latin America
108 results
Middle East
76 results
Europe
69 results
Europe, Eastern
67 results
Japan
58 results
Mexico
51 results
Israel
46 results
Africa
41 results
Asia
38 results
India
36 results
Germany
35 results
Russia (Federation)
31 results
France
28 results
Central America
26 results
Great Britain
24 results
Former Soviet republics
23 results
Iran
23 results
Southeast Asia
23 results
Brazil
22 results
Caribbean Area
22 results
Germany (West)
22 results
Arab countries
21 results
Cuba
20 results
Taiwan
19 results
European Economic Community countries
18 results
South Africa
18 results
Korea (South)
17 results
Nicaragua
17 results
Canada
16 results
East Asia
16 results
Italy
16 results
Pacific Area
16 results
Poland
16 results
Yugoslavia
16 results
Pakistan
14 results
Tropics
14 results
Vietnam
14 results
Egypt
13 results
Guatemala
13 results
Spain
13 results
Communist countries
12 results
Germany (East)
12 results
Peru
12 results
Argentina
11 results
Chile
11 results
Iraq
11 results
more…