TY  - BOOK
AU  - Kovscek, P. D.
AU  - Taylor, C. D.
AU  - Handewith, H.
TI  - Testing of a diesel-powered impact cutting head for hard-rock mining
PY  - 1991///]
CY  - [Washington, D.C.]
PB  - Bureau of Mines, U.S. Dept. of the Interior
KW  - Mining machinery
KW  - Testing
KW  - Free piston engines
ER  -