https://catalogobiblioteca.ingemmet.gob.pe/cgi-bin/koha/opac-search.pl?q=ccl=an%3A44%20and%20au%3ASinger%2C%20Donald%20A.%20and%20itype%3AARTI&format=rss2 Search results for 'an:44 and au:Singer, Donald A. and itype:ARTI' at Biblioteca - Ingemmet 0 20