1. Electric power generation from Texas lignite;Kaiser,1978
2. Strip-Mineable Coals Guidebook;Elevatorski,1980
3. Thickness of bituminous coal and lignite seams at all mines and thickness of overburden at all strip mines in the United States in 1950;Young;U.S. Bur. Mines Inf. Circ. No.,1952
4. Lignite resources in Texas;Kaiser;Texas Bur. Econ. Geol. Rept. Invest.,1980
5. Extraction of North Dakota lignite: environmental and reclamation issues;LaFevers;U.S. Dept. Energy Rept. No. ANL/AA-7,1977