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2. INE (National Statistics Institute), Spanish Statistical Office, http://www.ine.es, 2000 (last access February 2007).
3. Ardán (Information and Support to Business Activity Service), Sectorial references in Galicia (in Spanish), Zona Franca of Vigo Consortium, http://www.ardan.es, 2005 (last access February 2007), Spain.
4. IGE (Galician Statistics Institute), http://www.ige.eu, 2004, Galicia, Spain (last access February 2007).
5. Spanish Government, Spanish Law 16/2002, Integrated Prevention Pollution and Control, Official Gazette No. 157, 02/07/2002, 23910-23927, Spain, 2002.