Gopalakrishnan P., . (1974). Keralathinde samskarika charitram. : State Institute of Languages.
Gopalakrishnan P.K, . 1974. Keralathinde samskarika charitram. : State Institute of Languages.
Gopalakrishnan P.K, . Keralathinde samskarika charitram. : State Institute of Languages. 1974.