Dillruba, Nurun Nahar, and Sagarmay Barua. 2014. “Haemoglobin, Serum Ferritin and Serum-Mineral Levels of the Elderly People: A Comparison Between Urban and Rural Community”. Bangladesh Journal of Nutrition 26 (1):7-14. https://doi.org/10.3329/bjnut.v26i1.69739.