| United States. National Commission on Materials Policy - 1973 - 330 страници
...Mines, 1973. Identified Resources are defined as including reserves and materials other than reserves which are essentially well known as to location, extent...economic conditions or with improvements in technology. RESOURCE APPRAISAL TERMS Huge - Domestic resources (of the category shown) are greater than ten times... | |
| United States. Congress. Economic Joint Committee - 1974 - 466 страници
...RESOURCES are defined as including reserves and materials other than reserves which are reasonably well known as to location, extent and grade and which...exploitable in the future under more favorable economic condition* or with Improvements In technology. !/ HYPOTHETICAL RESOURCES are undiscovered, but geologically... | |
| United States. General Accounting Office - 1978 - 84 страници
...been underway for several years. 2/The United States has large deposits of these metals onshore that may be exploitable in the future under more favorable...economic conditions or with improvements in technology. A Department of the Interior official described these deposits as low grade. — Becoming a net exporter... | |
| United States. Department of the Interior - 1975
...for those materials are taken into account. i/ Resources of Selected Mineral Commodities well-known as to location, extent and grade and which may be...economic conditions or with improvements in technology. 3/ HYPOTHETICAL RESOURCES are undiscovered, but geologically are predictable deposits of materials... | |
| 1974 - 648 страници
...surface or subsurface areas. i Includes reserves and materials other than reserves which are reasonably well known as to location, extent, and grade and which...economic conditions or with improvements in technology. 1 Undiscovered but geologically predictable deposits of materials similar to identified resources.... | |
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