@book{124484,
	author = {Allen, Rick, and ebrary, Inc.},
	title = {The essentials of science, grades 7-12},
	publisher = {Association for Supervision and Curriculum Development,},
	year = {c2007.},
	series = {Priorities in practice},
	address = {Alexandria, Va. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10209449}
}