Subject Region
United States
7
England
3
Soviet Union
3
France
2
London
2
New York
2
New York (State)
2
Paris
2
Berkeley
1
California
1
Chicago
1
China
1
Great Britain
1
Houston
1
Illinois
1
Japan
1
Lancashire
1
North Carolina
1
Paris (France)
1
Pennsylvania
1
Philadelphia
1
Shanghai
1
Shanghai (China)
1
South Africa
1
South Carolina
1
Southern States
1
Texas
1
Virginia
1