@inproceedings{NACLP-1989-PyoR,
	author        = "Changwoo Pyo and Uday S. Reddy",
	booktitle     = "{Proceedings of the North American Conference on Logic Programming, 2 Volumes}",
	isbn          = "0-262-62064-2",
	pages         = "1115--1132",
	publisher     = "{MIT Press}",
	title         = "{Inference of Polymorphic Types for Logic Programs}",
	year          = 1989,
}