Control of chemical precursors and essential chemicals: hearings before the Subcommittee on Crime of the Committee on the Judiciary House of Representatives, 100. Congress, 1. session on H.R. 2585, H.R. 2846, H.R. 3062, and H.R. 3268 ... September 16 and October 15, 1987 (U.S. Gov.Print.Off., 1989)