OkoisorPEKumarV. Demand and need for dental care in Nigeria. Odontostomatol Trop1982; 6: 17–23
2.
LembaritisBSFrenckenJEPilotT. Prevalence and severity of periodontal conditions among adults in urban and rural Morogoro, Tanzania. Commun Dent Oral Epidemiol1988; 16: 240–3
3.
AinamoJBarmesDEBeagrieGB, Development of the World Health Organization (WHO) Community Periodontal Index of Treatment Needs (CPITN). Int Dent J1982; 32: 281–91
4.
World Health Organization. Oral health surveys, basic methods, 3rd edn.Geneva: World Health Organization, 1987
5.
CohenLK. International comparisons in the provision of oral health care. Br Dent J1980; 149: 347–51