Gopalakrishna Pillai, . (1975). Sanghikam Danashastrathil. : State Institute of Language.
Gopalakrishna Pillai, . 1975. Sanghikam Danashastrathil. : State Institute of Language.
Gopalakrishna Pillai, . Sanghikam Danashastrathil. : State Institute of Language. 1975.