Lawal, F. B.2023-08-282023-08-282013978-978-922-560-6ui_inbk_lawal_first_2012http://ir.library.ui.edu.ng/handle/123456789/8484In: O. Ibiyemi, J. O. Taiwo, G A. Oke, Handbook of Oral Health Care for School Teachers and Community Health workers. Pp. 83-92en-USBook chapter