Preliminary analysis of methodologies for mining thin-seam mountaintop coal resources /
- 出版日期：1990.
- 出版者：U.S. Dept. of the Interior, Bureau of Mines,
- 页数：ii, 41 p. :
- 出版地：Washington, D.C. :
- 第一责任说明：by William D. Mayercheck, Jasinder S. Jaspal, and Richard B. Farrar.
- 尺寸：28 cm.
- 分类号：a713
MARC全文
02h0006120 20090326091314.0 s1990 dcua frb |000|||eng | NGL n-usa-- a713 Mayercheck, William D. Preliminary analysis of methodologies for mining thin-seam mountaintop coal resources / by William D. Mayercheck, Jasinder S. Jaspal, and Richard B. Farrar. Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1990. ii, 41 p. : ill., maps ; 28 cm. Information circular ; 9270 Includes bibliographical references (p. 41). Coal mines and mining Appalachian Region. aJaspal, Jasinder S. ; aFarrar, Richard B. Information circular (United States. Bureau of Mines) ; 9270. aCN bNGL NGL P 720.66 In3 v9270 ; h1 fqyl0803