... (c) In carrying out the provisions of subsection (a) of this section the Administrator shall conduct research on, and survey the results of other scientific studies on, the harmful effects on the health or welfare of persons by the various known air... Prototype Aircraft Development: Hearings Before the Committee on Interstate ... - Halaman 17 oleh United States. Congress. Senate. Committee on Interstate and Foreign Commerce - 1950 - 192 halaman Tampilan utuh -
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