@incollection{Codd77,
  author	= {Codd, E. F.},
  editor	= {Klimbie, J. W. and Koffeman, K.},
  year		= {1977},
  title		= {Seven Steps to Rendez-vous with the Casual User},
  booktitle	= {Data Base Management},
  publisher	= {North-Holland},
  address	= {Amsterdam}
}