@inproceedings{SIGFIDET-1972-WalkerG,
	author        = "W. A. Walker and C. C. Gotlieb",
	booktitle     = "{Proceedings of the Third ACM-SIGFIDET Workshop on Data Description, Access and Control}",
	cdrom         = "SIGFIDET72/P189.pdf",
	pages         = "189--211",
	publisher     = "{ACM}",
	title         = "{Hybrid Trees: A Data Structure for Lists of Keys}",
	year          = 1972,
}