@book{30844,
	author = {Levy Paul S and  Lemeshow Stanley},
	title = {Sampling of populations:methods and applications},
	publisher = {Wiley      },
	year = {2008},
	series = {Wiley series in survey methodology},
	address = {New Jersey },
	edition = {4},
	note = {Includes bibliographical references.; Appendix 537-542p.; Index 571-576p.}
}