Region
1966
1
5.200
1
7.150
1
AMERICA LATINA
1
Africa
15
Africa, North
1
Africa, Sub-Saharan
2
Africa, West
1
Akron
1
Alabama
6
Alaska
6
Albany
1
Alberta
8
Albuquerque
2
America
2
Ames
1
Amérique
1
Amérique latine
1
Ann Arbor
5
Antwerp
1
Appalachian Mountains
1
Appalachian Region
1
Appalachian Region, Southern
2
Arab countries
2
Arctic regions
1
Argentina
5
Arizona
7
Arkansas
2
Ash Meadows National Wildlife Refuge (Nev.)
1
Asia
32
Asia, Central
1
Athens
3
Atlanta
29
Atlanta (Ga.)
2
Atlantic Coast
1
Atlantic Coast (U.S.)
2
Auckland
1
Austin
9
Australia
33
Australie
1
Austria
1
Azerbaijan
1
Bahia (State)
1
Bakersfield
1
Balkan Peninsula
2
Baltic States
1
Baltimore
10
Baltimore Metropolitan Area
1
Basel
1
Baton Rouge
1
more ...