00981cam a2200193 a 450000500170000000800410001702000150005803500150007305000230008811100960011124501660020726000270037330000110040050002000041165000370061170000260064871000260067471000870070020260817161439.0080624s1981    us      r     100|0 eng |  a0897910400  a.b1005237900aQA76.9 D3bA3 19812 aACM-SIGMOD International Conference on Management of Datad(1981 :cUniversity of Michigan)10aACM - SIGMOD 1981 International Conference on Management of Data :bApril 29 - May 1, the University of Michigan, Ann Arbor, Michigan /cedited by Y. Edmund Lien  aNew York :bACM,c1981  a230 p.  aPapers presented at the 1981 ACM - Sigmod International Conference on Management of Data. Sponsored by the Special Interest Group for Management of Data of the Association for Computing Machinery 0aData base managementvCongresses1 aLien, Y. Edmund,eed.1 aMichigan.bUniversity2 aAssociation for Computing Machinery.bSpecial Interest Group on Management of Data