000 00224nam a2200085 4500
080 _a
_b
245 _aIEC: 963 - 1988; Specification forunused Polybutenes
100 _aInternational Electrotechnical Commission
250 _a1
260 _aGeneva
_bIEC
_c1989
300 _a17
999 _c37020
_d37020