Thakkar, Hema, and CMS Rawat. “Kuppuswamy’s Socio-Economic Status Scale: Updating Income Ranges for the Year 2015”. Indian Journal of Community Health 27, no. 4 (December 31, 2015): 415–417. Accessed April 19, 2024. https://www.iapsmupuk.org/journal/index.php/IJCH/article/view/596.