Sumi, M. J., J. Barua, C. M. Jan, K. S. Imtiaz, I. Ahmed, and S. T. Ahmed. “Loss of First Permanent Molar Teeth in Patients Attending in OPDs of Selected Dental Hospitals in Dhaka City”. Bangladesh Journal of Dental Research &Amp; Education, vol. 5, no. 2, Aug. 2015, pp. 40-43, doi:10.3329/bjdre.v5i2.24714.