Não informado. (1976). International dredging abstracts. British Hydromechanics Research Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. International Dredging Abstracts. Bedford, Inglaterra: British Hydromechanics Research Association, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. International Dredging Abstracts. British Hydromechanics Research Association, 1976.
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