@inproceedings{ML-1989-Aha,
	author        = "David W. Aha",
	booktitle     = "{Proceedings of the Sixth International Workshop on Machine Learning}",
	isbn          = "1-55860-036-1",
	pages         = "387--391",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Incremental, Instance-Based Learning of Independent and Graded Concept Descriptions}",
	year          = 1989,
}