Pratap Singh, Sunil, and Balkrishan Shivram. “Economic Gain or Social Concern: The British Opium Policy in the Punjab Hill States, 1890-1940”. Summerhill: IIAS Review 31, no. 1 (January 7, 2026): 63–71. Accessed January 20, 2026. http://14.139.58.200/ojs/index.php/summerhill/article/view/1751.