000 00255nam a2200097Ia 4500
100 _aWhitakar J W & Sarkar G G
245 _aStudies in Coal Washability Parts 4, 5 & 6
260 _bC S I R, New Delhi
082 _aH235403/N/B09959
300 _app 16; 25*18
999 _c32731
_d32731