edited by John E. Tilton and William A. Vogely, Department of Mineral Economics, The Pennsylvania State University, University Part, Pennsylvania, U.S.A., Final report , U.S. Bureau of Mines,, Contract no. JO188044
Date
c1981
Series
Materials and society, v. 5, no. 3 (1981)
Open file report (United States. Bureau of Mines) ; 1981-97