For citations:
Fedorov V.N., Tikhonova N.A., Novikova Yu.A., Kovshov A.A., Istorik O.A., Myasnikov I.O. Problems of outdoor air quality hygienic assessment in the cities of the leningrad region. Hygiene and Sanitation. 2019;98(6):657-664. (In Russ.) https://doi.org/10.47470/0016-9900-2019-98-6-657-664