Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Michal Krzyzanowski,WHO Air Quality Guidelines for Europe,"Journal of Toxicology and Environmental Health, Part A",1528-7394,Informa UK Limited,2008-11-26,71,1,47-50,https://cir.nii.ac.jp/crid/1364233268792463360,https://doi.org/10.1080/15287390701557834