Jagadesan, S. and Subramanian, M.V. 2016. Study on Sunspots, Ozone and earth atmosphere variation at Pudukkottai, Tamilnadu (latitude: 10 0 23’ and longitude 78 0 52’). International Journal of Science and Engineering Invention. 2, 08 (Sep. 2016), 205 to 212. DOI:https://doi.org/10.23958/ijsei/vol02-i07/05.