000 00261pam a2200109a 44500
082 _aTR
_bTPR-121
100 _aWallace W. Roepke
245 1 _aBit ignition potential with worn carbide tips
260 _a
_b
_c
700 _aBruce D. Hanson
997 _aTR1166 C
999 _c404752
_d404752