Region
Great Britain
12
France
8
Germany
6
United States
6
Italy
5
England
4
India
4
Soviet Union
4
China
3
Europe
3
Japan
2
Africa
1
Bengal
1
Berlin
1
Berlin (Germany)
1
Chile
1
Cuba
1
Developed countries
1
Developing countries
1
Germany (East)
1
Gottingen
1
Gottingen (Germany)
1
Jamaica
1
Leningrad (R.S.F.S.R.)
1
Lima
1
Lima (Peru)
1
London
1
London (England)
1
Mexico
1
Mexico City
1
Nicaragua
1
Peru
1
South Asia
1
Venezuela
1