George T., . (1974). Survey. Trivandrum: State Institue of Languages; Trivandrum.
George T.V;Vappicha,V.N, . 1974. Survey. Trivandrum: State Institue of Languages; Trivandrum.
George T.V;Vappicha,V.N, . Survey. Trivandrum: State Institue of Languages; Trivandrum. 1974.