@inproceedings{ML-1989-YagerF,
	author        = "Ronald R. Yager and Kenneth M. Ford",
	booktitle     = "{Proceedings of the Sixth International Workshop on Machine Learning}",
	isbn          = "1-55860-036-1",
	pages         = "420--425",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Participatory Learning: A Constructivist Model}",
	year          = 1989,
}