Ball Mill Grinding of Coal http://127.0.0.1/xmlui/handle/123456789/719 Thu, 16 Apr 2026 21:41:43 GMT 2026-04-16T21:41:43Z Studies on Ball Mill Grinding of Coal http://127.0.0.1/xmlui/handle/123456789/720 Studies on Ball Mill Grinding of Coal Datta, B. C. Tue, 01 Jan 1957 00:00:00 GMT http://127.0.0.1/xmlui/handle/123456789/720 1957-01-01T00:00:00Z