Stock exchange regulation : hearing before the Committee on Interstate and Foreign Commerce, House of Representatives, Seventy-third Congress, second session on H.R. 7852, to provide for the registration of national securities exchanges operating in interstate and foreign commerce and through the mails and to prevent inequitable and unfair practices on such exchanges, and for other purposes : H.R. 8720, to provide for the regulation of national securities exchanges and of over-counter markets operating in interstate and foreign commerce or through the mails, and to prevent inequitable and unfair practice thereon, and for other purposes, February 14 to March 24, 1934.