India Department of Science & Technology. (1982). Research & development statistics 1980-81. Department of Science & Technology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIndia Department of Science & Technology. Research & Development Statistics 1980-81. Department of Science & Technology, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIndia Department of Science & Technology. Research & Development Statistics 1980-81. Department of Science & Technology, 1982.
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