1. Form 10-K, Annual Report for the Fiscal Year Ended December 31, 2011;Alpha Natural Resources Inc.,2012
2. Electric Power Statistics;APPA,2012
3. Form 10-K, Annual Report For the Fiscal Year Ended Dec. 31, 2011;Arch Coal Inc.,2012
4. Alpha Closing 8 Coal Mines, Cutting 1, 200 Jobs;Associated Press,2012
5. Class I Railroad Statistics. Statistics and Publications;Association of American Railroads,2011