https://biblioteca.ugb.edu.sv/cgi-bin/koha/opac-search.pl?idx=an%2Cphr&q=5616%26limit%3Dau%3AHayt%2C%20William%20H&format=rss2 Search results for 'an,phr: 5616&limit=au:Hayt, William H' at Biblioteca UGB 0 20