003460000a22001330004500060000800000082001600008100001700024100001700041245003800058260003500096260000900131300000800140650006400148  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