@book{15396,
	author = {Sarndal, Carl-Erick and Swensson, Bengt},
	title = {Model assisted survey sampling},
	publisher = {Springer-Verlag,},
	year = {1992},
	series = {Springer series in Statistics},
	address = {New York:},
	note = {"Purchased under NBHM grant for the year 1994-1995"}
}