@book{32338,
	author = {Pfeffermann, D. and Fine, Michelle.},
	title = {Essential Methods for Design Based Samples Surveys /},
	publisher = {Sage Publications,},
	year = {c1981.},
	address = {Beverly Hills :},
	note = {Includes indexes.},
	url = {http://www.loc.gov/catdir/enhancements/fy0660/81013606-d.html}
}