Region
Amérique du Nord
1
Austria
1
Boston
1
Canada
5
Caribbean Area
1
Chicago
2
Denmark
1
Developing countries
1
England
5
English-speaking countries
26
Estados Unidos
1
Europe
1
France
1
Germany
7
Grande-Bretagne
1
Great Britain
52
Harlem (New York, N.Y.)
2
Illinois
2
Japan
1
Massachusetts
2
Mexico
1
New York
2
New York (State)
2
New Zealand
1
Pays anglophones
1
Russia (Federation)
1
Scotland
1
South Africa
4
Soviet Union
1
Spain
1
Study and teaching (Elementary)
2
USA
1
United States
249
Wales
1
West Indies
1
Worcester
1
États-Unis
3