Howell, J. M. (1987). Copper in animals and man. Chemical Rubber Company Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHowell, John McC. Copper in Animals and Man. Boca Raton, Florida: Chemical Rubber Company Press, 1987.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHowell, John McC. Copper in Animals and Man. Chemical Rubber Company Press, 1987.
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