Region
United States
210
Taiwan
9
Great Britain
7
West (U.S.)
6
California
5
Alaska
4
Washington (State)
3
China
2
Mars (Planet)
2
Minnesota
2
Nevada
2
Outer space
2
Pennsylvania
2
San Francisco Bay Area
2
Texas
2
Antiquities, Prehistoric
1
Arizona
1
Australia
1
Bulgaria
1
Canada
1
Colombia
1
Cook Inlet
1
Developing countries
1
Digital techniques
1
Enterprise System
1
Greece
1
Gulf of Mexico
1
Heron Lake Watershed (Jackson County)
1
Japan
1
Mexico, Gulf of
1
Nebraska
1
Neshaminy Creek Watershed
1
New Jersey
1
New Mexico
1
New York (State)
1
Oregon
1
Osage Nation
1
Paliambela Kolindros Site (Greece)
1
Pierce County
1
Pieria Region
1
Pieria Region (Greece)
1
Puerto Rico
1
Puyallup River Watershed
1
Puyallup River Watershed (Wash.)
1
Rhode Island
1
Rio Hondo Watershed
1
San Juan Valley
1
San Juan Valley (San Benito County and Santa Clara County)
1
Saudi Arabia
1
Seattle
1
more ...