Heroin trafficking and abuse : a growing crisis : hearing before the Select Committee on Narcotics Abuse and Control, House of Representatives, One hundred first Congress, second session, July 19, 1990. - United States. Congress. Senate. Select Committee on Narcotics Abuse and Control (U.S. G.P.O. : For sale by the Supt. of Docs., Congressional Sales Office, U.S. G.P.O., 1991)