@book{7086, author = {Halpin, Terry.}, title = {Conceptual schema & relational database design.}, publisher = {Prentice Hall of Australia,}, year = {1995.}, address = {Sydney :}, edition = {2nd Ed.}, url = {https://uowd.box.com/s/emji2tyypl5bnk41qhxxpqodaug1myvj} }