Quelltext der Seite Codd, E. F. (1970): A Relational Model of Data for Large Shared Data Banks

{{Quelle:Artikel
| key         = Codd (1970)
| authors     = Edgar Frank Codd
| title       = A Relational Model of Data for Large Shared Data Banks
| subtitle    =
| journal     = Communications of the ACM
| volume      = 13
| number      = 6
| pages       = 377-387
| publisher   = Association for Computing Machinery
| address     = New York
| issn        =
| isbn        =
| year        = 1970
| month       = 6
| day         =
| language    = Englisch
| url         = http://dl.acm.org/citation.cfm?id=362685
| annotations = 
}}
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