Das Braja M., S. (2019). Principles of Geotechnical Engineering (9th.). Cengage Publication.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDas Braja M., Sobham. Principles of Geotechnical Engineering. 9th. New Delhi: Cengage Publication, 2019.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDas Braja M., Sobham. Principles of Geotechnical Engineering. 9th. Cengage Publication, 2019.
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