@inproceedings{SIGIR-1991-Motzkin,
	author        = "Dalia Motzkin",
	booktitle     = "{Proceedings of the 14th International ACM SIGIR Conference on Research and Development in Information Retrieval (Special Issue of the SIGIR Forum)}",
	cdrom         = "SIGIR1991/P291.pdf",
	doi           = "10.1145/122860.122890",
	isbn          = "0-89791-448-1",
	pages         = "291--303",
	publisher     = "{ACM}",
	title         = "{An Efficient Directory System for Document Retrieval}",
	year          = 1991,
}