1. Introduction 1973 ACM turing aware lecture;Canning;Comm. ACM,1973
2. The data base concept;Eriksen;Honeywell Comp. J.,1974
3. W. J. Waghorn: The DDL as an industry standard? Same as Ref. [13a].
4. The debate on data base management;Canning;EDP Analyzer,1972
5. What's happening with CODASYL-type DBMS?;Canning;EDP Analyzer,1974