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| | Sustainable Development of Industrial Minerals - Products |
 | | Langer, W.H., 2003, A General Overview of the Technology of In-Stream Mining of Sand and Gravel Resources, Associated Potential Environmental Impacts, and Methods to Control Potential Impacts: U.S. Geological Survey Open-File Report 02-0153, 44 p. |
 | | Arnold, L.R., Langer, W.H., and Paschke, S.S., 2003, Analytical and numerical simulation of the steady-state hydrologic effects of mining aggregate in hypothetical sand-and-gravel and fractured crystalline-rock aquifers: U.S. Geological Survey Water-Resources Investigations Report 02-4267, 56 p. |
 | | Langer, W.H., 2004, Potential environmental impacts of quarrying stone in karst, in Seeger, C.M., ed, Proceedings, 38th Forum on the Geology of Industrial Minerals, St. Louis, MO: Missouri: Geological Survey and Resources Assessment Division Report of Investigations No. 74, pp. |
| minerals.cr.usgs.gov /projects/industrial_minerals/products.html (2167 words) |
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