TY - CHAP A1 - Grötschel, Martin A1 - Lügger, Joachim A2 - Gaul, Wolfgang A2 - Loracek-Junge, H. T1 - Scientific Information Systems and Metadata T2 - Classification in the Information Age Y1 - 1999 UR - https://opus4.kobv.de/opus4-zib/frontdoor/index/index/docId/3131 SP - 3 EP - 20 PB - Springer ER -