@book{46172,
	author = {Block, James H.,},
	title = {Schools, society, and mastery learning /},
	publisher = {Holt, Rinehart and Winston,},
	year = {c1974.},
	address = {New York :},
	note = {"Based on papers presented at the Society, Schools, and Mastery Learning Symposium of the 1973 American Educational Research Association Convention."}
}