000 00541nam a2200193Ia 4500
999 _c76000
_d76000
005 20200720112900.0
008 180710s9999 xx 000 0 und d
020 _a251433
041 _aEN
082 _a621
_bMAC
_223
100 _aMcKinnon, Stephen David
245 _aProtection of deep vertical shaft systems
_c/ Stephen David McKinnon
260 _a[S.l]
_bJohannesburg
_c1989
300 _avariged pagings
509 _aNS
650 _aMichanical engineering
650 0 _a Shaft systems-mathematical models
_9102260
942 _cS