@inproceedings{SIGMOD-1977-YuC,
	author        = "Clement T. Yu and Francis Y. L. Chin",
	booktitle     = "{Proceedings of the Seventh ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD77/P169.PDF",
	doi           = "10.1145/509404.509432",
	pages         = "169--181",
	publisher     = "{ACM}",
	title         = "{A Study on the Protection of Statistical Data Bases}",
	year          = 1977,
}