@book{2667,
	author = {Who Task Group on Environmental Health Criteria for Sulfur Oxides and Suspended Particulate Matter and United Nations Environment Programme.},
	title = {Sulfur oxides and suspended particulate matter /},
	publisher = {World Health Organization [Albany, N.Y. : obtainable from the WHO Publications Centre] ,},
	year = {c1979},
	address = {Geneva :}
}