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- Geological Survey (U.S.)2,141
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- National Archives (Great Britain)130
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- Afghanistan. Department of Geological Survey101
- Turner, Kenzie J.78
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- Afghanistan. Idārah-i ʻUmūmī-i Jiyūdīzī va Kārtūgrāfī70
- Davis, Philip A. (Philip Arthur), 1950-66
- United States. National Park Service65
- Bohannon, Robert G.53
- Clark, Perry S.53
- Afghan Geological Survey33
- Southwest Florida Water Management District (Fla.)31
- Afghanistan. Geological and Mineral Survey30
- United States. Environmental Protection Agency30
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