United States Senate. Committee on Labor and Public Welfare
Periodical: Yarborough, Ralph W., and United States Senate. Committee on Labor and Public Welfare. "Air Pollution: The Threat is Now."
Congressional Record, (20 December 1969): S17419-17420. Article. Excerpt. 2 Images.
United States Government Printing Office
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Lederberg Grouping: SAM Science and Man Series
Letter from Ralph W. Yarborough to Benjamin C. Bradlee, Washington Post (January 10, 1970)