Mammen, K. (1942). Kerala culture: Its genesis and early history. City Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMammen, K. Kerala Culture: Its Genesis and Early History. Trivandrum: City Press, 1942.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMammen, K. Kerala Culture: Its Genesis and Early History. City Press, 1942.
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