@book{777,
	author = {Osherson, Daniel N.},
	title = {Logical abilities in children,},
	publisher = {L. Erlbaum Associates; distributed by the Halsted Press Division of Wiley, New York,},
	year = {1974-1976.},
	address = {Potomac, Md.,},
	note = {Vols. 3-4 published in: Hillsdale, N.J.}
}