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89
United States. Bureau of Land Management
87
United States. Bureau of Land Management. Colorado State Office
67
Geological Survey (U.S.)
56
National Operations Center (U.S.)
32
National Science and Technology Center (U.S.)
21
United States. Bureau of Land Management,
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National Operations Center (U.S.),
19
United States. Bureau of Land Management. Colorado State Office,
12
Geological Survey (U.S.),
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United States. Bureau of Land Management. Utah State Office
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United States. Bureau of Land Management. Utah State Office,
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