Environmental impacts of U.S. coal exports
Tài liệu tham khảo
Buroff, 1979
1981, Inside Energy, 3
Ewing, 1979
ICF, Inc., 1980
Interagency Coal Export Task Force, 1981
Manalytics, Inc., 1979
1978
1978
Office of Technology Assessment, 1978
World Coal Study, 1980
World Coal Study, 1980