DAVIS, M. L. (1991). Introduction To Environmental Engineering. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDAVIS, Mackenzie Leo. Introduction To Environmental Engineering. McGraw-Hill, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDAVIS, Mackenzie Leo. Introduction To Environmental Engineering. McGraw-Hill, 1991.
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