000 00447nam a22001337a 4500
008 230516b |||||||| |||| 00| 0 eng d
040 _aNational Science Library
_cNational Science Library
080 _a553.9(082.2)
_bK8
245 _aProceedings of the research seminar coal-a petrographic approach
_c/ Department of Geology
260 _aNagpur:
_bDepartment of Geology,
_c1968
300 _a81p.
650 _aPetrograph
942 _2udc
_cPR
999 _c30446
_d30446