@article {1691,
	title = {Protocol to abate acidification, eutrophication and ground-level ozone.},
	year = {1999},
	month = {30 November 1999},
	institution = {UNECE},
	address = {Geneva, Switzerland},
	url = {http://www.unece.org/env/lrtap/multi_h1.html},
	author = {.UNECE}
}
