Estimate the Relationship on Haemoglobin, Serum Iron & Vitamin B12: A Prospective Observational Study. Int. Arch. Biomed. Clin. Res. [Internet]. 2024 Mar. 20 [cited 2026 May 17];5(3):53-6. Available from: http://iabcr.org/index.php/iabcr/article/view/266