Gopalakrsna Pillai, S. (1975). Sankhyikam - dhanasastrattil. State Institute of Languages.
Dyfyniad Arddull ChicagoGopalakrsna Pillai, S. Sankhyikam - Dhanasastrattil. Trivandrum: State Institute of Languages, 1975.
Dyfyniad MLAGopalakrsna Pillai, S. Sankhyikam - Dhanasastrattil. State Institute of Languages, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.