@book{12748,
	author = {World Health Organization. Regional Office for Europe. and Yrjanheikki, Erkki J.},
	title = {Levels of PCBs, PCDDs, and PCDFs in breast milk : results of WHO-coordinated interlaboratory quality control studies and analytical field studies.},
	publisher = {FADL for WHO Regional Office for Europe,},
	year = {1989.},
	series = {Environmental health ; 34.},
	address = {Copenhagen : }
}