Exploration of some major coalfields in India
Roy, K.L. and Others
Exploration of some major coalfields in India - India 1977 - 1-584 p. - Geologicl Survey of India. Miscellaneous Publication No. 35 .
Exploration of some major coalfields in India - India 1977 - 1-584 p. - Geologicl Survey of India. Miscellaneous Publication No. 35 .