Narwadiya, Sachin. “Ambient Air- How Much Safe or Unsafe for Breathing”. Anusandhaan - Vigyaan Shodh Patrika 7, no. 01 (October 10, 2019): 153-155. Accessed March 23, 2026. https://www.anushandhan.in/index.php/ANSDHN/article/view/1303.