Deshappriya, N.Attanayake, R.N.2016-06-232016-06-232015Deshappriya, N. and Attanayake, R.N. 2015. Lesson 24: Identification of disease symptoms using live specimens, In: Practical Manual for GCE A/L Biosystem Technology Teachers. Ministry of Education and University of Kelaniya, Sri Lanka. 171-176 pp.978-955-4563-50-6http://repository.kln.ac.lk/handle/123456789/13665enLearning Object