EKKA U, KUMAR A, ROY HS. Particulate matter exposure of combine harvester operator during wheat harvesting in northern India. Indian J Agri Sci [Internet]. 2021 Jul. 26 [cited 2026 Jul. 3];91(5):678–682. Available from: https://epubs.icar.org.in/index.php/IJAgS/article/view/112982