Nandan, H., Goswami, M., Joshi, N. , Kumar, V. , Singh, N. , Kumar, P. , Giri, A. and Singh, N. 2024. Seasonal variation assessment of ambient air quality during COVID-19 lockdown in Uttarakhand state, India. MAUSAM. 75, 3 (Jul. 2024), 703–714. DOI:https://doi.org/10.54302/mausam.v75i3.6067.