000 00258nam a22001097a 4500
082 _a621.042 IMP'E
100 _aENERCON
_979549
245 _aIMPROVING STEAM BOILER OPERATING EFFICIENCY
260 _aISLAMABAD
_bENERCON
_c1987
300 _aC-2
942 _cBK
999 _c584575
_d584575