@book{154951,
	author = {Beatty, Alexandra S. and ebrary, Inc.},
	title = {Mathematical and scientific development in early childhood},
	publisher = {National Academies Press,},
	year = {c2005.},
	address = {Washington, D.C. :},
	note = {"Mathematical Sciences Education Board, Board on Science Education, Center for Education, Division of Behavioral and Social Sciences and Education, National Research Council of the National Academies."},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10075706}
}