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