Protection of Lechuguilla Cave [electronic resource] : hearing before the Subcommittee on National Parks, Forests, and Public Lands of the Committee on Natural Resources, House of Representatives, One Hundred Third Congress, first session, on H.R. 698, to protect Lechuguilla Cave and other resources and values in and adjacent to Carlsbad Caverns National Park, hearing held in Washington, DC, March 2, 1993.