Teorey, Toby J.
Design of database structures
Englewood Cliffs, NJ: Prentice-Hall, 1982
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Whittington, R.P.
Database systems engineering
Clarendon Press , 1988
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Elmasri, Ramez
Fundamentals of database systems
Benjamin Cummings, 1994
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Ramakrishnan, Raghu
Database management systems
McGraw-Hill, 1998
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Date, C.J.
An introduction to database systems
Addison-Wesley, 1981
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