000 00240pam a2200109a 44500
082 _aTR
_bTPR-75
100 _aR. J. Seibel
245 1 _aDustiness of different coal seams
260 _a
_b
_c
700 _aF. F. Mccall
997 _aTR3893 C
999 _c404985
_d404985