@Book{RANFE2009010560, title = "S\'{u}lfidos de ars\'{e}nico : su naturaleza y composici\'{o}n", author = "Alerany y Nebot, Jos\'{e}, 1821-1884", publisher = "Madrid : [s.n.]", editor = "[s.n.]", URL = "http://bibliotecavirtual.ranf.com/i18n/consulta/registro.do?id=10560", year = "1861", }