00852nam0-22003251i-450 99000029159040332120241216084751.0000029159FED01000029159(Aleph)000029159FED0120001010d1962----km-y0itay50------baengUSa-------001yyIon ExchangeFriederich Helfferich.New YorkMcGraw-Hill Book Co.1962IX, 624 p.ill.24 cmIoni539.723ita628Helfferich,Friedrich15653ITUNINARICAUNIMARCBK99000029159040332104 090-39CI 5087DINCHA CHI 43315660/2024FAGBCDINCHFAGBCIon Exchange127724UNINA