Recycling of municipal solid waste : hearings before the SubCommittee on Transportation and Hazardous Materials of the Committee on Energy and Commerce, House of Representatives, One Hundred First Congress, first session, on H.R. 1593, H.R. 1810, H.R. 2648, H.R. 2845, and H.R. 2853 ... July 12 and 13, 1989