@book{15639,
	author = {Isard, Walter. and Smith, Christine,},
	title = {Practical methods of regional science and empirical applications /},
	publisher = {New York University Press,},
	year = {1990.},
	series = {Selected papers of Walter Isard ;},
	address = {Washington Square, N.Y. :},
	url = {http://www.loc.gov/catdir/enhancements/fy1203/89013986-b.html}
}