by IS-1973-1973 | IS-1973-1973.
by IS-1976-1976 | IS-1976-1976.
by IS : 2032 (Part III) - 1962 | IS : 2032 (Part III) - 1962.
by IS : 2032 (Part V) - 1965 | IS : 2032 (Part V) - 1965.
by IS : 2032 (Part VI) - 1965 | IS : 2032 (Part VI) - 1965.
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