Subject Region
20th century
1
Chicago
3
China
8
Europe
6
Europe, Northern
2
European Union countries
2
France
9
Germany
2
Great Britain
4
Illinois
3
Israel
3
Italy
2
Japan
1
Korea (North)
1
Korea (South)
1
New England
1
New York
2
New York (N.Y.)
2
New York (State)
2
New Zealand
4
Sweden
1
Taiwan
1
United States
79
West (U.S.)
4