Subject
Puerto Rico
5
Land use
4
Outdoor recreation
4
North America
2
Santa Monica Mountains National Recreation Area (Calif.)
2
Amistad National Recreation Area (Tex.)
1
Chamizal National Memorial (El Paso, Tex.)
1
Cities and towns Growth
1
Earthquakes
1
El Chamizal (Mexico and Tex.)
1
English language Tzotzil
1
Forest management
1
Fuelwood cutting
1
Hazard mitigation
1
Human ecology
1
Inyo National Forest (Calif. and Nev.)
1
Land cover
1
Land use, Rural
1
Land use, Urban
1
Landscapes
1
Los Padres National Forest (Calif.)
1
Mexico Boundaries
1
National parks and reserves
1
Natural areas
1
Phytogeography
1
Pinnacles National Park (Calif.)
1
Saguaro National Park (Ariz.)
1
Six Rivers National Forest (Calif.)
1
Soils
1
Spanish language Tzotzil
1
Trails
1
Tsunamis
1
Tsunamis Safety measures
1
Tzotzil language English
1
United States Boundaries
1
Yosemite National Park (Calif.)
1
Yosemite Valley (Calif.)
1