NITROGEN 552,953 Nitrogen oxides / first draft prep, by J.A. Graham [et al.] ; [IPCS [International Programme on Chemical Safety]. - 2 ed. -Geneva : World Health Organization, 1997. -XXIV, 550 s. s wykr. ; 21 cm. -(Environmental Health Criteria / WHO, ISSN 0250-863X ; 188) ISBN 92-4-157188-8