@InProceedings{A_Three_Tiered_Approach_to_Natural_Language_Text_Retrieval,
	author = "Tim Finin, Robin McEntire, Carl Weir, and Barry SIlk",
	title = "{A Three-Tiered Approach to Natural Language Text Retrieval}",
	month = "August",
	year = "1991",
	organization = "AAAI",
	booktitle = "AAAI-91 Workshop on Natural Language Text Retrieval",
	publisher = "AAAI Press",
}