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*[http://insa.nic.in/writereaddata/UpLoadedFiles/IJHS/Vol15_1_4_SBagchi.pdf "History Of Mining In India - Circa 1400 - 1800 And Technology Status" ] by S Bagchi and A K Ghose ''Indian Journal of History of Science'' 15(1):25-29, May 1980 insa.nic.in*[http://docs.google.com/viewer?a=v&q=cache:_3OI6o_ItBkJ:www.new.dli.ernetacademia.inedu/rawdataupload6773429/upload/insa/INSA_1/20005af2_25.pdf+guntur+diamond+mines&hl=en&gl=au&pid=bl&srcid=ADGEESgc8xgvl5_fvwZM4skC8LinAYydrGeology_and_India_1770_-2wqvK7bEYJBVgPuMWa61Zk_idjfOEthSQopwiiba5nIL56tDiNLOC7mq_1851_a_study_in_the_methods_and_motivations_of_a_colonial_science ''Geology and India, 1770 -xe66cEHyguJaeJ09lr5RNbpX5VzrOlFFZdZ_hD8hpBnnS_WsZ&sig=AHIEtbRFDVOfx7DbMFoy1gGXkPQjd6QxQw html version1851: a study in the methods and motivations of a colonial science'']by Andrew Grout 1995 Ph D Thesis, [http://wwwSchool of Oriental and African Studies, London University.new.dli.ernet.in/rawdataupload/upload/insa/INSA_1/20005af2_25academia.pdf original pdf]edu