Abkürzung für National Expert Group on Transboundary Air Pollution. http://www.freshwaters.org.uk/resources/documents/negtap_2001_final_report.php http://www.nbu.ac.uk/negtap/ http://www.portlandpress.com/pcs/books/prod_det.cfm?product=9780852933770 Gefunden auf https://bfw.ac.at/rz/wlv.lexikon?keywin=2936
Abkürzung für National Expert Group on Transboundary Air Pollution. http://www.freshwaters.org.uk/resources/documents/negtap_2001_final_report.php http://www.nbu.ac.uk/negtap/ http://www.portlandpress.com/pcs/books/prod_det.cfm?product=9780852933770