|
zone 1
|
Northwestern Zone of North America
|
|
zone 2
|
Northeastern Zone of North America
|
|
zone 3
|
Western Zone of North America
|
|
zone 4
|
Central Zone of North America
|
|
zone 5
|
Eastern Zone of North America
|
|
zone 6
|
Southern Zone of North America
|
|
zone 7
|
Central American Zone
|
|
zone 8
|
West Indies Zone
|
|
zone 9
|
Northern Zone of South America
|
|
zone 10
|
Western Zone of South America
|
|
zone 11
|
Central Zone of South America
|
|
zone 12
|
Southwest Zone of South America
|
|
zone 13
|
Southeast Zone of South America
|
|
zone 14
|
Western Zone of Europe
|
|
zone 15
|
Central European Zone
|
|
zone 16
|
Eastern Zone of Europe
|
|
zone 17
|
Western Zone of Siberia
|
|
zone 18
|
Central Siberian Zone
|
|
zone 19
|
Eastern Siberian Zone
|
|
zone 20
|
Balkan Zone
|
