(1981). Water And Wastewater Engineering Systems D. Barnes [et Al.]. Pitman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWater And Wastewater Engineering Systems D. Barnes [et Al.]. Pitman, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWater And Wastewater Engineering Systems D. Barnes [et Al.]. Pitman, 1981.
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