@book{150260,
	author = {National Science Teachers Association.},
	title = {Dig in!},
	publisher = {NSTA Press,},
	year = {c2001.},
	address = {Arlington, Va. :},
	note = {"NSTA Stock Number: PB159X"--verso of title page.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10240819}
}