@inproceedings{SIGIR-1980-Hirschman,
	acmid         = "636679",
	author        = "Lynette Hirschman",
	booktitle     = "{Proceedings of the Joint BCS/ACM Symposium on Information Storage and Retrieval}",
	cdrom         = "SIGIR/1980/P154.pdf",
	isbn          = "408107758",
	pages         = "154--171",
	publisher     = "{Butterworths}",
	title         = "{Retrieving Time Information From Natural-Language Texts}",
	year          = 1980,
}