Coal mine roof instability :
categories and causes /
by Noel N. Moebs and Raymond M. Stateham.
APA Citation
Moebs, N. N., Stateham, R. M. (1986). Coal mine roof instability: categories and causes. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines.
MLA Citation
Moebs, Noel N, and Raymond M Stateham. Coal Mine Roof Instability: Categories And Causes. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines, 1986.
Warning: These citations may not always be complete (especially for serials).