Lester, J. (1981). Pilot study to test site use of pipe defect classification and CRODISS systems. Transport and Road Research Laboratory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLester, John. Pilot Study to Test Site Use of Pipe Defect Classification and CRODISS Systems. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1981.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLester, John. Pilot Study to Test Site Use of Pipe Defect Classification and CRODISS Systems. Transport and Road Research Laboratory, 1981.
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