Jagadesan S, Subramanian MV. Study on Sunspots, Ozone and earth atmosphere variation at Pudukkottai, Tamilnadu (latitude: 100 23’ and longitude 780 52’). ijsei [Internet]. 2016 Sep. 25 [cited 2024 May 1];:205 to 212. Available from: http://ijsei.in/index.php/ijsei/article/view/34