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- Ministry of Industry and Technology, the Egyptian Geological Survey and Mining Authority3
- Egyptian Geological Survey and Mining Authority2
- U.S. Dept. of the Interior, U.S. Geological Survey2
- U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by USGS Information Services2
- BRGM Service Géologique National1
- British Geological Survey1
- Česká geologická služba1
- Del. Geological Survey, University of Del1
- Egyptian Mineral Resources Authority1
- Interior--Geological Survey1
- State of Missouri, Dept. of Natural Resources, Missouri Geological Survey1
- U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services1
- U.S. Geological Survey1
- U.S. Geological Survey ; For sale by U.S. Geological Survey Information Services1
- U.S. Geological Survey ; Information Services [distributor]1
