Region
United States
14
Germany
4
Afghanistan
2
Africa, West
2
États-Unis
2
Russia (Federation)
2
Vietnam
2
Abstracting and indexing
1
Afrique occidentale
1
Belgium
1
Bolivia
1
Cambodia
1
Cambridge
1
China
1
Developing countries
1
Europe
1
France
1
Gaza Strip
1
Great Britain
1
Honduras
1
India
1
Japan
1
Massachusetts
1
Mexico
1
Mississippi
1
South Africa
1
West Africa
1
West Bank
1
Zimbabwe
1
Zuid-Afrika
1