@book{15313,
	author = {Maddala, G. S.},
	title = {Limited-dependent and qualitative variables in econometrics /},
	publisher = {Cambridge University Press,},
	year = {1983.},
	address = {Cambridge [Cambridgeshire] ;},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/cam022/82009554.html}
}