@book{181137,
	author = {Alt, Martha Naomi. and Choy, Susan P. and National Center for Education Statistics.},
	title = {In the middle},
	publisher = {U.S. Dept. of Education, Office of Educational Rersearch and Improvement},
	year = {(2000)},
	series = {NCES . Statistical analysis report},
	address = {Washington, DC}
}