@book{10237, url = {http://www.loc.gov/catdir/enhancements/fy0632/2004048113-d.html}, edition = {18th ed.}, title = {Economics /}, note = {International Edition}, author = {Samuelson, Paul A. and Nordhaus, William D.}, publisher = {McGraw-Hill/Irwin,}, year = {c2005.}, address = {Boston :} }