Bhattarai, R. et al. 2017. Oral Hygiene and Periodontal Health Status of Urban Population of Kathmandu District: A Pilot Study. Journal of Nepalese Society of Periodontology and Oral Implantology. 1, 1 (Jun. 2017), 12–16. DOI:https://doi.org/10.3126/jnspoi.v1i1.23521.