District of Columbia Securities Act : hearings before the Subcommittee on the Judiciary of the Committee on the District of Columbia, United States Senate, Eighty-eighth Congress, second session on S. 1001 (H.R. 9419), bills to provide for the regulation of the business of selling securities in the District of Columbia, and for the licensing of persons engaged therein, and for other purposes, March 5, 19, and April 29, 1964