India. Registrar general and census commissioner & Das, B. (1976). Census of India 1971. Series 4, Bihar: Report on establishments and subsidiary tables on establishment tables. Govt. of India press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIndia. Registrar general and census commissioner और B.L Das. Census of India 1971. Series 4, Bihar: Report on Establishments and Subsidiary Tables on Establishment Tables. Govt. of India press, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIndia. Registrar general and census commissioner और B.L Das. Census of India 1971. Series 4, Bihar: Report on Establishments and Subsidiary Tables on Establishment Tables. Govt. of India press, 1976.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.