Lower Gondwana sedimentation in Ramgarh coalfield district Hazaribagh, Bihar, India http://127.0.0.1/xmlui/handle/123456789/16848 Fri, 17 Apr 2026 07:15:12 GMT 2026-04-17T07:15:12Z Lower Gondwana sedimentation in Ramgarh coalfield district Hazaribagh, Bihar, India http://127.0.0.1/xmlui/handle/123456789/16849 Lower Gondwana sedimentation in Ramgarh coalfield district Hazaribagh, Bihar, India Sen, Debaprasad Wed, 01 Dec 1965 00:00:00 GMT http://127.0.0.1/xmlui/handle/123456789/16849 1965-12-01T00:00:00Z