Barro, Robert J. Economic growth / Robert J. Barro, Xavier Sala-i-Martin. - 2nd ed. - Cambridge, Mass. : MIT Press, c2004. - xvi, 654 p. : ill ; 24 cm. ISBN: 0262025531 LCCN: 2003059392 Subjects--Topical Terms: Economic development--Mathematical models. Dewey Class. No.: 338.9/001/51