Balakrishnan Nair N., . (1971). Paristhitivijnanam. TVPM: State Institute of Languages.
Balakrishnan Nair N, . 1971. Paristhitivijnanam. TVPM: State Institute of Languages.
Balakrishnan Nair N, . Paristhitivijnanam. TVPM: State Institute of Languages. 1971.