Over-the-counter markets. Regulation of over-the-counter markets, hearings before subcommittee, 75th Congress, 3d session, on S. 3255, H. R. 9634, bills to provide for establishment of mechanism of regulation among over-the-counter brokers and dealers operating in interstate and foreign commerce or through mails, comparable to that provided by national securities exchanges under securities exchange act of 1934, Apr. 11, 1938.