| Chambefiin, D. D, "Rehtional Data-base Management Systems', ACM Computing Surveys, Vol. 8, No, 1, Mar., 19. C, odd, . F., "A Relational Model Of Data for Large Shared Data Banks', C. ACM Vol. 13 t No. 6, June, lg?0. Codd, I. F., "A Data Base Sublanguage founded on the Relational Calculus', P-roc_-s_LqKs of the A.CM-SIGFIDET Workshop on Data |
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Chambefiin, D. D, "Rehtional Data-base Management Systems', ACM Computing Surveys, Vol. 8, No, 1, Mar., 19. C, odd, . F., "A Relational Model Of Data for Large Shared Data Banks', C. ACM Vol. 13 t No. 6, June, lg?0. Codd, I. F., "A Data Base Sublanguage founded on the Relational Calculus', P-roc_-s_LqKs of the A.CM-SIGFIDET Workshop on Data
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