Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector7709710.17816/kazmj77097Research ArticleLead in printing housesMiloslavskyV.info@eco-vector.com151219242099959963007202130072021Copyright © 2021, Miloslavsky V.2021<p>An extremely interesting work on this issue was carried out by Grodzovsky in the laboratory of N.K.T. (Labor Hygiene, 1924, No. 4)</p>Kazan Medical archiveКазанский медицинский архив