000 00354nam a2200121Ia 4500
008 220217s9999 xx 000 0 und d
245 0 _aSpecification for butyl rubber compounds (including halobutyl compounds).
260 _c1980
500 _aStandard number: BS 3227
650 _aButyl rubber compounds
650 _aHalobutyl compounds
942 _cST
999 _c73053
_d73053