@book{8341,
	author = {WHO Study Group on Recommended Health-Based Limits in Occupational Exposure to Selected Mineral Dusts (Silica Coal) (1984 : Geneva). and World Health Organization},
	title = {Recommended health-based limits in occupational exposure to selected mineral dusts (silica, coal : report of a WHO study group [meeting held in Geneva from 6 to 12 March 1984].},
	publisher = {World Health Organization,},
	year = {1986.},
	series = {(WHO technical report series ; 734)},
	address = {Geneva : }
}