1
by Stenson, Michael R.
Published 1980
2
by Jayasooria, Denison.
Published 2008
3
by Arasaratnam, Sinnappah
Published 1970
4
by Siddique, Sharon
Published 1982
5
by Jackson, R. N, 1920-
Published 1961
6
by Jayanath Appudurai
Published 2015