000
00272pam a2200109a 44500
082
_a
TR
_b
RI-9418
100
_a
Thomas M. Barczak
245
1
_a
Canopy and base load distribution on a longwall shield
260
_a
_b
_c
700
_a
David F. Gearhart
997
_a
TR6797 C
999
_c
405951
_d
405951