Pilla, G. R. (1972). Vanijyaparamaya Kattitapatukal. State Institute of language.
Chicago Edition CitationPilla, G R. Vanijyaparamaya Kattitapatukal. Trivandrum: State Institute of language, 1972.
Deismireacht MLAPilla, G R. Vanijyaparamaya Kattitapatukal. State Institute of language, 1972.
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