Viquarunnisa, M.- ur-R., and K. Visweswara Rao. “Weighment Method of Diet Survey - a Case Study of Reference Periods by Economic Status”. The Indian Journal of Nutrition and Dietetics, vol. 36, no. 12, Dec. 1999, pp. 505-20, https://www.informaticsjournals.com/index.php/ijnd/article/view/7046.