@book{19504,
	author = {Ayres, Leonard Porter,},
	title = {The effect of promotion rates on school efficiency,},
	publisher = {Division of Education, Russell Sage Foundation,},
	year = {1913.},
	series = {[Russell Sage Foundation, New York. Dept. of Child Hygiene. Pamphlet]},
	address = {New York City,},
	note = {Reprinted from the American school board journal, May, 1913.}
}