Region
Australia
Canada
7
New Zealand
7
Great Britain
6
Australie
3
China
3
Japan
3
Soviet Union
3
United States
2
Africa, North
1
Antarctica
1
Arizona
1
Brazil
1
Cambridge
1
Connecticut
1
Czechoslovakia
1
English-speaking countries
1
Europe
1
Hawaii
1
Hungary
1
India
1
Indonesia
1
Massachusetts
1
Melbourne (Vic.)
1
Middletown
1
Middletown (Conn.)
1
Monterey (Mass.)
1
New Mexico
1
New York (N.Y.)
1
Nouvelle-Zélande
1
Nova Scotia
1
Poland
1
San Francisco (Calif.)
1