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- U.S. Geological Survey7
- The Survey5
- Md. Geological Survey4
- State of Md., Dept. of Natural Resources, Md. Geological Survey4
- State of Md., Dept. of Natural Resources, Md. Geological Survey, Williams & Heintz Map Corp.)3
- Dept. of the Interior, U.S. Geological Survey2
- Geological Survey Department of Cyprus,Printed by Co-op2
- Geological Survey of India2
- The Survey : [Books and Open-file Reports Section, distributor]2
- The Survey ; For sale by Map Distribution2
- Department of Mines and Geology, Ministry of Industry, Government of Nepal1
- Dept. of Natural Resources, Md. Geological Survey1
- The Department1
- The Survey : [Books and Open-File Reports Section, distributor]1
- The Survey ; For sale by Branch of Distribution1
- The Survey ; For sale by Distribution Section ; Branch of Distribution1
- University of the State of New York, State Education Dept1
