00365nam a2200133Ia 4500 210430s9999 xx 000 0 und d 9788121903592 660 D2131A Dara, S.S. 6458 A Textbook of Engineering Chemistry Dara, S.S. New Dehli. S. Chand & Company. 1986 972p. REF ddc 565761 565761 0 0 0 0 SCME SCME REF 0000-00-00 0 660 D2131A SCME-4710 2021-04-30 2021-04-30 REF