United States. Soil Conservation Service. (1985). National engineering handbook. Water Resources Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Soil Conservation Service. National Engineering Handbook. Littleton, Colo: Water Resources Publications, 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited States. Soil Conservation Service. National Engineering Handbook. Water Resources Publications, 1985.
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