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- North Carolina Dept. of Natural Resources and Community Development, Geological Survey Section4
- North Carolina Dept. of Natural and Economic Resources, Office of Earth Resources4
- North Carolina Dept. of Natural Resources and Community Development, Division of Land Resources, Geological Survey Section2
- N.C. Geological Survey1
- North Carolina Dept of Natural Resources and Community Development, Geological Survey Section1
- North Carolina Dept. of Natural and Economic Resources, Division of Earth Resources, Geology and Mineral Resources Section1
- North Carolina Dept. of Natural and Economic Resources, Division of Planning and Evaluation, Mineral Resources Section1
- The Survey ; For sale by Branch of Distribution1
- The Survey ; For sale by Branch of Distribution, USGS1
- U.S. Geological Survey ; For sale by Branch of Distribution1
