Language
BS 450 - 1958
BS 3575 - 1963
BS 2693-2 - 1964
BS 4933 - 1973
BS 4278 - 1984
BS 7419 - 1991
BS 2470 - 1973
BS 275 (-9) - 1927
BS 4174 - 1972
BS 4620 (T7) - 1970
BS 4183 (T5) - 1967
BS 4190 - 2001
BS 4190 - 2014
BS 4183 (T3) - 1967
BS 1768 - 1963
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