000 00275pam a2200109a 44500
082 _aTR
_bTPR-108
100 _aEdward F. Divers
245 1 _aSideboard device for inproved face ventilation in coal mines
260 _a
_b
_c
700 _aFred N. Kissell
997 _aTR3919 C
999 _c404997
_d404997