@book{25881,
	author = {Lehtonen, Risto and Pahkinen, Erkki},
	title = {Practical methods for design and analysis of complex surveys},
	publisher = {John Wiley,},
	year = {2004},
	series = {Statistics in practice},
	address = {New York:},
	edition = {2nd},
	note = {"Purchased under NBHM grant for the year 2004-2005"}
}