Tài liệu tham khảo WikiPedia: Alquízar http://www.guije.com/pueblo/municipios/halquizar/i... http://www.statoids.com/ycu.html http://www.atenas.inf.cu/todo/Estadisticas/TABLA%2... //tools.wmflabs.org/geohack/geohack.php?language=v...