Virginia Polytechnic Institute and State University. Dept. of Mining and Minerals Engineering & United States. Dept. of Energy. Mining Research and Development. (1981). Design optimization in underground coal systems: Final technical report as of February 28, 1981. U.S. Dept. of Energy, Assistant Secretary for Energy Technology, Division of Fossil Fuel Extraction, Mining Research and Development.
Citace podle Chicago (17th ed.)Virginia Polytechnic Institute and State University. Dept. of Mining and Minerals Engineering a United States. Dept. of Energy. Mining Research and Development. Design Optimization in Underground Coal Systems: Final Technical Report as of February 28, 1981. [Washington?]: U.S. Dept. of Energy, Assistant Secretary for Energy Technology, Division of Fossil Fuel Extraction, Mining Research and Development, 1981.
Citace podle MLA (8th ed.)Virginia Polytechnic Institute and State University. Dept. of Mining and Minerals Engineering a United States. Dept. of Energy. Mining Research and Development. Design Optimization in Underground Coal Systems: Final Technical Report as of February 28, 1981. U.S. Dept. of Energy, Assistant Secretary for Energy Technology, Division of Fossil Fuel Extraction, Mining Research and Development, 1981.