BAGYARAJ, Murugesan; 						ISLAM, Zubairul; 						RANGANATHAN, Muthukumara samy.
 Investigation of effect of Covid -19 on air quality using geospatial  technology in Tamil Nadu, India.
<strong>Bulletin of Environmental and Scientific Research</strong>, [S.l.], v. 9, n. 2-3, p. 1-6, aug. 2020.
ISSN 2278-5205.
Available at: &lt;<a href="https://www.besr.org.in/index.php/besr/article/view/137" target="_new">https://www.besr.org.in/index.php/besr/article/view/137</a>&gt;. Date accessed: 21 apr. 2026.