Ramavarma, . (1974). Kanththayum Vidhyuthiyum. : State Language of Institute, Trivandrum.
Ramavarma, . 1974. Kanththayum Vidhyuthiyum. : State Language of Institute, Trivandrum.
Ramavarma, . Kanththayum Vidhyuthiyum. : State Language of Institute, Trivandrum. 1974.