Region
- United States 18 results
- Great Britain 6 results
- England 4 results
- London 4 results
- Africa 2 results
- Arizona 2 results
- Central America 2 results
- China 2 results
- Colorado River (Colo.-Mexico) 2 results
- France 2 results
- Grand Canyon 2 results
- Grand Canyon (Ariz.) 2 results
- Illinois 2 results
- India 2 results
- Mexico 2 results
- Rome 2 results
- Tamil Nadu 2 results
- Tamil Nadu (India) 2 results
- Yugoslavia 2 results