29 september 2014
Eco-musea
Vechtstreek - A natural and cultural biography http://www.interactions-online.com/page_news.php?id_news=183
Vechtstreek - A natural and cultural biography http://www.interactions-online.com/page_news.php?id_news=183
De Europese Landschapsconventie (Verdrag van Florence) http://www9.minlnv.nl/servlet/page?_pageid=264&_dad=portal30&_schema=PORTAL30
Europese organisatie ter bescherming van cultuurmonumenten dd 1963http://www.europanostra.org/