Oil Shale and Tar Sands Draft Programmatic Environmental Impact Statement (EIS) Concerning potential leases of Federal oil sands lands in Utah and oil shale lands in Utah, Wyoming, and Colorado
Truy cập ngày 28 tháng 6 năm 2007.  Oil Shale and Tar Sands Draft Programmatic Environmental Impact Statement (EIS) Concerning potential leases of Federal oil sands lands in Utah and oil shale lands in Utah, Wyoming, and Colorado