Keystone XL Pipeline : examining scientific and environmental issues : hearing before the Subcommittee on Environment joint with the Subcommittee on Energy, Committee on Science, Space, and Technology, House of Representatives, One Hundred Thirteenth Congress, first session, Tuesday, May 7, 2013.
Publication Info.
Washington : U.S. Government Printing Office, 2013.
Washington, DC : For sale by the Superintendent of Documents, U.S. Government Printing Office