Varghese, P. C. (2012). Engineering geology for civil engineers (Eastern Economy Edition.). PHI Learning.
Lua i Stíl Chicago (17ú heag.)Varghese, P. C. Engineering Geology for Civil Engineers. Eastern Economy Edition. New Delhi: PHI Learning, 2012.
Lua MLA (8ú heag.)Varghese, P. C. Engineering Geology for Civil Engineers. Eastern Economy Edition. PHI Learning, 2012.
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