Nag, Dilip Kumar. Model analysis of fractured and jointed rock masses [microform] / Dilip Kumar Nag. - [United KIngdom : Universiti of London, 1971. - 3 microfiches ; 11 x 15 cm. MFC42. Thesis (Master of Science) - University of London, 1971. Subjects--Topical Terms: Petrology.Mineralogy.