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Institution
Collection
Format
Subject
33
Acidification
Atmospheric nitrogen dioxide Counting
33
Atmospherics
Environmental monitoring
2
Chihuahuan Desert
2
Southwestern States
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1
Alibates Flint Quarries National Monument (Tex.)
1
Aniakchak National Monument and Preserve (Alaska)
1
Apostle Islands National Lakeshore (Wis.)
1
Arches National Park (Utah)
1
Arctic National Wildlife Refuge (Alaska)
1
Assateague Island National Seashore (Md. and Va.)
1
Atlantic Coast (South Atlantic States)
1
Badlands National Park (S.D.)
1
Bent's Old Fort National Historic Site (Colo.)
1
Bering Land Bridge National Preserve (Alaska)
1
Big South Fork National River and Recreation Area (Tenn. and Ky.)
1
Bighorn Canyon National Recreation Area (Mont. and Wyo.)
1
Black Canyon of the Gunnison National Park (Colo.)
1
Blue Ridge National Heritage Area (N.C.)
1
Bryce Canyon National Park (Utah)
1
Cabrillo National Monument (San Diego, Calif.)
1
Canyon de Chelly National Monument (Ariz.)
1
Canyonlands National Park (Utah)
1
Cape Cod National Seashore (Mass.)
1
Cape Krusenstern National Monument (Alaska)
1
Capitol Reef National Park (Utah)
1
Capulin Volcano National Monument (N.M.)
1
Cedar Breaks National Monument (Utah)
1
Channel Islands National Park (Calif.)
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Language
Literary Form
Region
4
Alaska
3
Arizona
3
California
3
Colorado
2
Chihuahuan Desert
2
New Mexico
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2
New York (State)
2
North Carolina
2
Oklahoma
2
Southwestern States
2
Virginia
2
Wyoming
1
Alabama
1
Alibates Flint Quarries National Monument
1
Alibates Flint Quarries National Monument (Tex.)
1
Aniakchak National Monument and Preserve
1
Aniakchak National Monument and Preserve (Alaska)
1
Apostle Islands National Lakeshore
1
Apostle Islands National Lakeshore (Wis.)
1
Arches National Park (Utah)
1
Arctic National Wildlife Refuge
1
Arctic National Wildlife Refuge (Alaska)
1
Arkansas
1
Assateague Island National Seashore (Md. and Va.)
1
Atlantic Coast (South Atlantic States)
1
Badlands National Park
1
Badlands National Park (S.D.)
1
Bent's Old Fort National Historic Site
1
Bent's Old Fort National Historic Site (Colo.)
1
Bering Land Bridge National Preserve
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Year of Publication