00434nam a22001697a 450000500170000002000180001704100130003508200150004810000230006324500390008625000120012526000530013730000090019070000240019970000190022370000220024220260624073300.0  a9789937120593  aEnglish   a540bYAD-p  aYadav, Paras Nath   aPrinciples of Chemistry Grade XII   a1st ed.  aKathmandu bAdvance Saraswati Prakashan c2079BS  a634p  aChaudhary, Upendra   aThapa, Bishal   aRaut, Ram Lakhan