Hines, L. G. (1973). Environmental issues: Population, pollution, and economics. Norton.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHines, Lawrence Gregory. Environmental Issues: Population, Pollution, and Economics. New York: Norton, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHines, Lawrence Gregory. Environmental Issues: Population, Pollution, and Economics. Norton, 1973.
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