00279cam a2200097 i 450008200170000010000250001724500330004226000590007530000100013465000370014400a660.2844 GEL  aGel Filteration ....00aGel Filteration and practice  a[S.I]bdistributed by pharmacia Fine chemicalscc1976.  a64p : 0agel filteration,theroy,practicle