India. Dept. of Coal & India. Dept. of Coal. Annual report - Department of Coal. Govt. of India, Ministry of Energy, Dept. of Coal.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIndia. Dept. of Coal और India. Dept. of Coal. Annual Report - Department of Coal. New Delhi: Govt. of India, Ministry of Energy, Dept. of Coal.
एमएलए (8वां संस्करण) प्रशस्ति पत्रIndia. Dept. of Coal और India. Dept. of Coal. Annual Report - Department of Coal. Govt. of India, Ministry of Energy, Dept. of Coal.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.