Koru P., . (1953). Jyothishabalabhodini. : Mangalodayam ; Thrissur.
Koru P.K, . 1953. Jyothishabalabhodini. : Mangalodayam ; Thrissur.
Koru P.K, . Jyothishabalabhodini. : Mangalodayam ; Thrissur. 1953.