Distribution of minor elements in some coals in the Western and Southwestern regions of the Interior coal province - Zubovic, Peter, 1915-; Stadnichenko, Taisia, 1894-1958; Sheffey, Nola B., 1929-1996 (Washington : United States Government Printing Office, 1967)
Keywords: uhlí; coal; Spojené státy americké; United States; bulletiny; information bulletins