000 00272pam a2200109a 44500
082 _aTR
_bRI-9418
100 _aThomas M. Barczak
245 1 _aCanopy and base load distribution on a longwall shield
260 _a
_b
_c
700 _aDavid F. Gearhart
997 _aTR6797 C
999 _c405951
_d405951