00310nam a2200121Ia 4500 190829s9999||||xx |||||||||||||| ||und|| 9788121905399 Dara, S. S A Textbook In Engineering Chemistry S. Chand & Co. New Delhi 1994 Chemistry BK 2563 2563 0 0 0 0 CHE GBCTL GBCTL F39 2023-12-04 100.00 660 DAR/T 24893 BK