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- U.S. Geological Survey132
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- Interior-Geological Survey79
- The Survey41
- Dept. of the Interior, U.S. Geological Survey18
- Surveys and Mapping Division, Ministry of Lands, Housing and Urban Development15
- IGN10
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- Interior--Geological Survey7
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- Government of the United Republic of Tanzania5
- Geological Survey of Alabama4
- Ministère de la Défense Nationale3
- University of the State of New York, State Education Dept3
- Comitato per le scienze geologiche e minerarie,Garfica Editoriale Cartografica S.p.A.2
- Direktorat Geologi2
- El Instituto2
- Historic Urban Plans2
- Instituto de Geociências, Universidade Federal do Rio Grande do Sul2
