India. Registrar general and census commissioner & Narayanan, K. (1973). Census of India 1971. Series 9, Kerala: Report and tables on establishments. s.n.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIndia. Registrar general and census commissioner और K. Narayanan. Census of India 1971. Series 9, Kerala: Report and Tables on Establishments. s.n, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIndia. Registrar general and census commissioner और K. Narayanan. Census of India 1971. Series 9, Kerala: Report and Tables on Establishments. s.n, 1973.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.