003450000a22001330004500060000800000082001600008100001700024100001600041245003800057260003500095260000900130300000800139650006400147  a100  a630.243 CHO  aChopra,  S L  aKanwar, J S  aAnalytical agricultural chemistry  a New Delhi, Kalyani publishers  c1976  a518  aAgricultural chemistry/ Chromatography/ Volumetric analysis