 | Genevieve Poyneer Hendricks - 1921 - 386 стор.
...of mineral substances, with a view to improving health conditions, increasing safety, efficiency and economic development, and conserving resources through...quarrying, metallurgical, and other mineral industries. It also makes inquiries into the economic conditions affecting these industries ; investigates the... | |
 | Fred Wilbur Powell - 1922 - 184 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... | |
 | Brookings Institution. Institute for Government Research - 1922 - 184 стор.
...mineral substances, with a view to improving health conditions, and increasing safety, efficiency, economic development, and conserving resources through...To inquire into the economic conditions affecting those industries ; To investigate explosives and peat ; and On behalf of the government to investigate... | |
 | United States. Congress. House. Committee on Appropriations - 1922 - 968 стор.
...other mineral substances, with a view to improving health conditions and increasing safety, efficiency, economic development, and conserving resources through...to inquire into the economic conditions affecting those industries; and including all equipment, supplies, expenses of travel and subsistence: Provided,... | |
 | Fred Wilbur Powell - 1922 - 184 стор.
...mineral substances, with a view to improving health conditions, and increasing safety, efficiency, economic development, and conserving resources through...To inquire into the economic conditions affecting those industries ; To investigate explosives and peat ; and On behalf of the government to investigate... | |
 | United States. Congress. House. Appropriations - 1922 - 972 стор.
...other mineral substances, with a view to improving health conditions and increasing safety, efficiency, economic development, and conserving resources through...to inquire into the economic conditions affecting those industries; and including all equipment, supplies, expenses of travel and subsistence: Provided,... | |
 | United States. Congress. House. Committee on Appropriations - 1922 - 1210 стор.
...other mineral substances, with a view to improving health conditions and increasing safety, efficiency, economic development, and conserving resources through...to inquire into the economic conditions affecting those industries: and including all equipment, supplies, expenses of travel and subsistence: Provided,... | |
 | 1922 - 184 стор.
...mineral substances, with a view to improving health conditions, and increasing safety, efficiency, economic development, and conserving resources through...To inquire into the economic conditions affecting those industries ; To investigate explosives and peat; and Another section further elaborates them... | |
 | William Franklin Willoughby - 1923 - 326 стор.
...mineral substances, with a view to improving health conditions, and increasing safety, efficiency, economic development, and conserving resources through...To inquire into the economic conditions affecting those industries ; To investigate explosives and peat ; and On behalf of the Government, to investigate... | |
 | United States, United States. Bureau of the Budget - 1923 - 1144 стор.
...substances, other than fuels, with a view to improving health conditions and increasing safety, efficiency, economic development, and conserving resources through the prevention of waste in the mining, quarrjang, metallurgical, and other mineral industries; to inquire into the economic conditions affecting... | |
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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... 
