U. Briefs.IFIP WG 9.1 Working Conference on Systems Design for, with, and by the Users(1982 : Riva del Sole, Italy)：Sytesms design for, with, and by the suers : proceedings.North-Holland Pub. Co.,1983.
IFIP WG 9.1 Working Conference on Systems Design for, with, and by the Users(1982 : Riva del Sole, Italy)：Sytesms design for, with, and by the suers : proceedings
