Comparative shortwall and room-and-pillar mining costs /
by L.E. Green and E.R. Palowitch.
APA Citation
Green, L. E., Palowitch, E. R. (Eugene Robert)., United States. Bureau of Mines. (1977). Comparative shortwall and room-and-pillar mining costs. [Washington]: Dept. of the Interior, Bureau of Mines.
MLA Citation
Green, Larry E, Eugene R. (Eugene Robert) Palowitch, and United States. Bureau of Mines. Comparative Shortwall And Room-and-pillar Mining Costs. [Washington]: Dept. of the Interior, Bureau of Mines, 1977.
Warning: These citations may not always be complete (especially for serials).