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WikiPedia: Alt_Urgell http://cat.lleida.com/comarca/index.html?comarca=5 http://www.ine.es/inebase/cgi/um?M=/t20/e260/a2005... http://alturgell.ddl.net/ http://www.gencat.net/probert/comarca/alt_urgell.h... http://www.idescat.net/territ/BasicTerr?TC=3&V0=2&... //tools.wmflabs.org/geohack/geohack.php?language=v... https://commons.wikimedia.org/wiki/Category:Alt_Ur...