Imtiaz, D. ., S. D. . Kandpal, and R. . Juyal. “A Study on Reasons for Initiation and Frequency of Smoking Among Rural Population in Dehradun District of Uttarakhand”. National Journal of Community Medicine, vol. 7, no. 04, Apr. 2016, pp. 298-01, https://www.njcmindia.com/index.php/file/article/view/917.