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.
Chicago Style (17th ed.) CitationVirginia Polytechnic Institute and State University. Dept. of Mining and Minerals Engineering and 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.
MLA引文Virginia Polytechnic Institute and State University. Dept. of Mining and Minerals Engineering and 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.