TY - GEN AU - Sellahewa, P. G. AU - Toner, M. A. AU - Wijesinghe, T. TI - Impact of self-reported voice symptoms on social and occupational life among primary school teachers and their knowledge of vocal hygiene techniques, habits and treatment options PY - 2013/// CY - Kelaniya PB - University of Kelaniya KW - Student Research Reports ER -