@proceedings {70,
	title = {Workshop on critical limits and effects based approaches for heavy metals and persistent organic pollutants},
	journal = {3-7 November 1997},
	year = {1998},
	publisher = {Federal Environment Agency (Umweltbundesamt), Berlin},
	address = {Bad Harzburg, Germany},
	author = {UN ECE Convention on Long-range Transboundary Air Pollution and Task Force on Mapping}
}
