000 00294pam a2200109a 44500
082 _aTR
_bIC-9300
100 _aRobert H. Peters
245 1 _aMiners views about why people go under unsupported roof and how to stop them
260 _a
_b
_c
700 _aRobert F. Randolph
997 _aTR6503 C
999 _c405731
_d405731