Region
Africa
15
Africa, Sub-Saharan
5
America
1
Arabian Peninsula
1
Argentina
1
Asia
1
Asia, Central
2
Burkina Faso
1
Cambodia
1
Canal Zone
1
Caribbean Area
3
Caucasus, South
1
China
2
Confederate States of America
3
Developing countries
2
East Asia
3
Ethiopia
2
Ghana
2
Great Britain
1
Greece
1
India
4
Israel
1
Italy
3
Kampala
1
Kenya
1
London (England)
2
Malawi
2
North America
1
Ohio
1
Palestine
1
Panama
1
Rome
2
Rome (Italy)
1
Rwanda
1
Senegal
1
Singapore
1
Soviet Union
2
Tanzania
6
Tennessee River Region
1
USSR
1
Uganda
4
United States
30