@book{12991,
	author = {Working Group on Indoor Air Quality: Biological Contaminants (1988 : Rautavaara, Finland). and World Health Organization. Regional Office for Europe.},
	title = {Indoor air quality : biological contaminants : report on a WHO meeting, Rautavaara, 29 August - 2 September 1988.},
	publisher = {WHO Regional Office for Europe,},
	year = {1990.},
	series = {WHO regional publications. European series ; no.31.},
	address = {Copenhagen : }
}