000
00240pam a2200109a 44500
082
_a
TR
_b
TPR-75
100
_a
R. J. Seibel
245
1
_a
Dustiness of different coal seams
260
_a
_b
_c
700
_a
F. F. Mccall
997
_a
TR3893 C
999
_c
404985
_d
404985