Economic Effects of Western Federal Land Use Restrictions on U.S. Coal Markets Geological Survey (U.S.) Published: 1991 Total Pages: 208 Get eBook
U.S. Geological Survey-Missouri Geological Survey Symposium Bruce E. Wright Published: 1990 Total Pages: 412 Get eBook
New Publications of the Geological Survey Geological Survey (U.S.) Published: 1991 Total Pages: 746 Get eBook