Drillability of Some Indian Rocks With Regard to Percussive Drilling http://127.0.0.1/xmlui/handle/123456789/3035 Tue, 14 Apr 2026 15:54:57 GMT 2026-04-14T15:54:57Z Drillability of Some Indian Rocks With Regard to Percussive Drilling http://127.0.0.1/xmlui/handle/123456789/3036 Drillability of Some Indian Rocks With Regard to Percussive Drilling Pajthankar, Anand Govind Sun, 01 Jan 1978 00:00:00 GMT http://127.0.0.1/xmlui/handle/123456789/3036 1978-01-01T00:00:00Z