00724nam0-22002891i-450-99000033340040332120001010000033340FED01000033340(Aleph)000033340FED0100003334020001010d--------km-y0itay50------baitay-------001yyRefractoriesBy F.H. Norton.New YorkMcGraw-Hill1942XIV,798 p., ill., 22 cm668Norton,F.H.18769ITUNINARICAUNIMARCBK99000033340040332104 186-96CIDINCHDINCHRefractories123714UNINAING01