https://biblioteca.ugb.edu.sv/cgi-bin/koha/opac-search.pl?idx=an%2Cphr&q=50%26limit%3Dsu-to%3ALIDERAZGO%26limit%3Dau%3ACovey%2C%20Stephen%20R&format=rss2 Search results for 'an,phr: 50&limit=su-to:LIDERAZGO&limit=au:Covey, Stephen R' at Biblioteca UGB 0 20