000 00292nam a2200121Ia 4500
008 211209s1968 xx 000 0 und d
041 _aeng
082 _a662.6 N68 NOR
100 _aNORTON F H
245 _aREFRACTORIES
260 _aNEW YORK
_bMCGRAW-HILL BOOK & COMPANY
_c1968
300 _a460
999 _c5131
_d5131