00420 a2200181 4500 066487 OSt 20210929150630.0 540 T74C Tro, Nivaldo Chemistry in focus by Nivaldo Tro 4th ed. New Delhi Cengage Learning 2009 559p. Chemistry ddc BK 536 536 0 0 ddc 0 0 TXB CURAJ CURAJ 2012-03-07 CHM 2022.00 540 T74C 773 2024-11-21 2020-09-02 BK