National Council of Applied Economic Research. (1970). Survey of backward districts of Andhra Pradesh.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Council of Applied Economic Research. Survey of Backward Districts of Andhra Pradesh. New Delhi, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Council of Applied Economic Research. Survey of Backward Districts of Andhra Pradesh. 1970.
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