@book{71307,
	author = {Brewer, K. R. W. and Hanif, Muhammad.},
	title = {Sampling with unequal probabilities /},
	publisher = {Springer-Verlag,},
	year = {c1983.},
	series = {Lecture notes in statistics ;},
	address = {New York :},
	note = {Includes indexes.}
}