Dias, R.K.S.Wijenayake, K.2015-04-272015-04-272000Dias, R.K.S. and Wijenayake, K., 2000. Taxonomic key for the direct identification of some mayfly nymphs (Order: Ephemeroptera) of Sri Lanka, Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya, Sri Lanka; 2000: pp 07.http://repository.kln.ac.lk/handle/123456789/7101enArticle