http://biblioteca1.aunar.edu.co/cgi-bin/koha/opac-search.pl?q=ccl=su-na%3Dau%3A%22Samuelson%2C%20Paul%20A.%20Nordhaus%2C%20William%20D.%22&format=rss2 Search results for 'su-na=au:"Samuelson, Paul A. Nordhaus, William D."' at Biblioteca Zambrano Bucheli AUNAR 0 20