000 00826n a2200265 4500
001 00953296
003 PWmBRO
005 20240602102313.0
008 910802s1990 dcu b f00010 eng
010 _a 90002477
069 _a 91045102
090 0 0 _aVF
_b622.25/H243c
100 1 0 _aHanna, K.
245 1 0 _aCoal mine entry intersection behavior study /
_cby K. Hanna, D. Conover, and K. Haramy.
260 0 _aWashington, DC :
_bUnited States Dept. of the Interior, Bureau of Mines,
_c1990.
300 _aiii, 78 p. :
_bill.
490 1 _aReport of investigations ;
_v9337
650 0 _aShaft sinking.
650 0 _aRock mechanics.
700 1 0 _aConover, D.
700 1 0 _aHaramy, Khamis Y.
830 0 _aReport of investigations (United States. Bureau of Mines) ;
_v9337
942 _2ddc
994 0 1 _a081002
999 _c56974
_d56974