000
00273pam a2200097a 44500
082
_a
TR
_b
RI-9413
100
_a
G. M. Molinda
245
1
_a
Effects of horizontal stress related to stream valleys on the stability of coal mine openings
260
_a
_b
_c
997
_a
TR6792 C
999
_c
405946
_d
405946