Physical hazards in the work environment. by Lankatilake K N. in Occupational Health: an introduction for health care workers. 2^nd edition, edited by Herath H.M.S.S.D, Seneviratne S.R. de A, Lankatilake K.N. Faculty of Medicine, University of Colombo, January 2014. ISBN 978-955-0460-53-3.