555.4
I39R
           Chowdhury, M. K. Roy
               Records of the geological survey of India (Vol.107, Part I) annual general report of the geological survey of India for the year 1972-73 \ M. K. Roy Chowdhury - New Delhi : Govt. of India, 1979.
               vi,403p
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                Subjects: GEOLOGY; STRATIFICATIONS.