@inproceedings{SIGMOD-1980-Cattell,
	author        = "R. G. G. Cattell",
	booktitle     = "{Proceedings of the 10th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD80/P144.PDF",
	doi           = "10.1145/582250.582273",
	pages         = "144--150",
	publisher     = "{ACM Press}",
	title         = "{An Entity-based Database User Interface}",
	year          = 1980,
}