 | 1938 - 272 стор.
...of mineral substances with a view to improving health conditions, and increasing safety, efficiency, economic development, and conserving resources through...the economic conditions affecting these industries ; to investigate explosives and peat ; and on behalf of the Government to investigate the mineral fuels... | |
 | United States. Congress. House. Committee on Appropriations - 1938 - 1658 стор.
...of mineral substances witk a view to improving health conditions, and increasing safety, efficiency, economic development, and conserving resources through...the economic conditions affecting these industries; to investigate explosives »M Eeat; and on behalf of the Government to investigate the mineral fuels... | |
 | 1938 - 274 стор.
...of mineral substances with a view to improving health conditions, and increasing safety, efficiency, economic development, and conserving resources through...the economic conditions affecting these industries; to investigate explosives and peat ; and on behalf of the Government to investigate the mineral fuels... | |
 | United States. Congress. House. Committee on Appropriations - 1938 - 1656 стор.
...mineral substances •with a view to improving health conditions, and increasing safety, efficiency, economic development, and conserving resources through...the economic conditions affecting these industries; to investigate explosives and peat; and on behalf of the Government to investigate the mineral fuels... | |
 | United States. Congress. House. Committee on Appropriations - 1939 - 1926 стор.
...of mineral substances with a view to improving health conditions, and increasing safety, efficiency, economic development, and conserving resources through...the economic conditions affecting these industries; to investigate explosives and peat; and on behalf of the Government to investigate the mineral fuels... | |
 | United States. Congress. House. Committee on Appropriations - 1939 - 2006 стор.
...safety, efficiency, economic development, and conserving resources through the prevention of wast* in the mining, quarrying, metallurgical, and other...the economic conditions affecting these industries; to investigate explosives and peat; and on behalf of the Government to investigate the mineral fuel^... | |
 | United States. Congress. Senate. Special Committee on the Investigation of Silver - 1939 - 1194 стор.
...safety, efficiency, economic development, and conserving resources through the prevention of waste iri the mining, quarrying, metallurgical, and other mineral...the economic conditions affecting these industries; to investigate explosivei and peat; and on behalf of the Government to investigate the mineral fuels... | |
 | United States. Department of the Interior - 1939 - 28 стор.
...was created in l9l0 to conduct inquiries and scientific and technologic investigations with a view to conserving resources through the prevention of waste...quarrying, metallurgical, and other mineral industries? - you have thirteen experiment stations and many field offices and safety stations throughout the mining... | |
 | United States. Congress. House. Appropriations - 1940 - 1944 стор.
...substances, other than fuels, with a view to improving health sonditions and increasing safety, efficiency, economic development, and conserving resources through...including all equipment, supplies, expenses of travel and eubsiistence, and the purchase, not to exceed $12,000, including exchange, operation, maintenance,... | |
 | United States. Congress. House. Committee on mines and mining - 1940 - 576 стор.
...of mineral substances with a view to improving health conditions, and increasing safety, efficiency, economic development, and conserving resources through...the economic conditions affecting these industries ; to investigate explosives and peat ; and on behalf of the Government to investigate the mineral fuels... | |
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Interior, to conduct inquiries and scientific and technologic investigations concerning mining, and the preparation, treatment, and utilization of mineral substances with a view to improving health conditions, and increasing safety, efficiency, economic... 
