1. ***39th session of World Heritage Committee held in Bonn, Germany, 28 June—8 July 2015, report on the state of conservation of World Heritage properties, WHC-15/39.COM/7B, 114
2. ***Altamira Cave to Repoen, 25 February 2014.
http://artdaily.com/news/68441/Closed-in-2002–Spain-s-paleolithic-Altamira-Cave-to-reopen–albeit-to-very-small-groups-#.Uw21g7T46Sp[/url]
3. ***Examination of the State of Conservation of World Heritage properties, World Heritage Committee, 13th Session, Vilnius, Lithuania, 2006
4. ***Government Decree No. 1546, 18 December 2003, Chap. 1, Art. 2
5. ***
http://ticcih.org/about/about-ticcih/
. Accessed Feb 2014