Material handling devices for underground mines /
by Ernest J. Conway and Richard L. Unger.
APA Citation
Conway, E. J., Unger Richard L. (1988). Material handling devices for underground mines. Pgh. [i.e. Pittsburgh] Pa.: U.S. Dept. of the Interior, Bureau of Mines.
MLA Citation
Conway, Ernest J, and Unger Richard L. Material Handling Devices for Underground Mines. Pgh. [i.e. Pittsburgh] Pa.: U.S. Dept. of the Interior, Bureau of Mines, 1988.
Warning: These citations may not always be complete (especially for serials).