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), p. 205 to 212. doi: 10.23958/ijsei/vol02-i07/05.