000
00248pam a2200097a 44500
082
_a
TR
_b
IC-7573
100
_a
Arno C. Fieldner
245
1
_a
Achievements in mine safety research and problems yet tobe solved
260
_a
_b
_c
997
_a
TR5229 C
999
_c
405404
_d
405404