@inproceedings{SIGMOD-1975-Gerritsen,
	author        = "Rob Gerritsen",
	booktitle     = "{Proceedings of the Fifth ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD75/P166.PDF",
	doi           = "10.1145/500080.500104",
	pages         = "166",
	publisher     = "{ACM}",
	title         = "{A Preliminary System for the Design of DBTG Data Structures}",
	year          = 1975,
}