00342nam a2200133Ia 4500082002400000100004400024245006000068250001300128260003100141300000900172490001700181500000500198700000500203  a661.320212bIn39.IS  aIndian Standards Institution, New Delhi  aIndian standard specification for soda ash, technicalb  a3rd Rev.  aNew DelhibThe Auth.c1982  a16p.  aIS  251-1982  a  a