U.S. international drug policy, Asian gangs, heroin, and the drug trade: joint hearing before the Committee on the Judiciary and the Caucus on In- ternational Narcotics Control of the United States Senate, 101st Congress, 2. session on the growing membership of Asian organized crime groups and the growing amounts of heroin coming to the United States from Burma, Laos, and Thailand, August 21, 1990 (Senate hearing, 1991)