000 00262pam a2200109a 44500
082 _aTR
_bRI-9294
100 _aRichard J. Mainiero
245 1 _aUse of sheathed explosive charges on longwalls
260 _a
_b
_c
700 _aLon D. Santis
997 _aTR6667 C
999 _c405828
_d405828