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vls/2603nrwcece.visuallibrary.netvdModellsysteme der Operationsforschungein Beitr.zur TheorieFischer, HanneloreautPiehler, JoachimauttextbookBerlinAkad.-Verl.1974monographic118 S.HT00462395861nc/f685619930722050873901 https://ce.visuallibrary.net//domainresource/static/graphics/connectors/viewerLogo.gif http://193.30.112.129:83/F/?func=find-c&ccl_term=ICS%3D050873901+X0001 https://ce.visuallibrary.net/id/89994 https://ce.visuallibrary.net/i3f/v20/89994/manifest https://ce.visuallibrary.net/proto_ftsearch/89994