Coal, I. C. o. E. i. t. P. o. (1979). Spotlight on coal: Report of the Committee on Economies in the Production of Coal, Govt. of India. India Book Exchange.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCoal, India. Committee on Economies in the Production of. Spotlight on Coal: Report of the Committee on Economies in the Production of Coal, Govt. of India. India Book Exchange, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCoal, India. Committee on Economies in the Production of. Spotlight on Coal: Report of the Committee on Economies in the Production of Coal, Govt. of India. India Book Exchange, 1979.
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