Tilt precursors in rock before failure : a laboratory investigation /
by B. T. Brady.
- [Washington, D.C.] : U.S. Dept. of the Interior, 1975.
- 9 p. : ill.
- Report of investigations / Bureau of Mines, U.S. Department of the Interior ; 8101 .
- Report of investigations (U.S. Department of the Interior. 8101 .