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100 1 _aOchsenbein, P.
245 0 0 _aThe Patent Documentation Group {PDG}
650 _aPatentdokumentation
_93575
650 _aIndustrie
_91985
773 0 _aWPI. 9(1987),2,92-95.
_wz_WPI
999 _c9985
_d9985