↑ Town survey report: Bihar, Dhanbad by Rajendra Prasad Assistant Director of Census Operations, Bihar S. C. Saxena Deputy Director of Census Operations, Bihar. 1988:pp 22: It was the existence of coal that first attracted the railway authority to extend the railways and with them came the Gujrati people as an expert railway contractor with an experience of railway construction work at Thana. They then met Raja of Jharia and purchased some having underneath wast [sic] wealth in shape of coal...
↑ Census of India, 1981: Bihar. Series 4. Controller of Publications – Bihar. 1981. tr. 22. It was the existence of coal that first attracted the railway authority to extend the railways and with them came the Gujrati people as an expert railway contractor with an experience of railway construction work at Thana. They then met Raja of Jharia and purchased some having underneath wast wealth in shape of coal
↑ Diary of Golden Days at Jharia – A Memoir & History of Gurjar Kashtriya Samaj of Kutch in Coalfields of Jharia – written by Natwarlal Devram Jethwa of Calcutta/Sinugra compiled by Raja Pawan Jethwa: 1998
