@book{21752,
	author = {Welch, Patrick J. and Welch, Gerry F.},
	title = {Economics, theory and practice /},
	publisher = {Dryden Press,},
	year = {c1998.},
	address = {Fort Worth :},
	edition = {6th ed.},
	note = {Rev. ed. of: Economics, theory & practice. 5th ed. c1995.},
	url = {http://lcweb.loc.gov/catdir/toc/97-65984.html}
}