19 1 50 De, Nikhil Krishna Primary Author Sarkar, Himangsu Kumar Additional Author mixed material 8124702039 Calcutta Paschimbanga Rajya Pustak Parsad 1994 Pettijohn, F.J. Primary Author mixed material Delhi 32 CBS Publishers & Distributors 1984 Spencer, Edgar Winston Primary Author mixed material New Delhi Oxford & IBH Publishing Co. 1962 An Introduction To Historical Geology Kummel, Bernhard Primary Author mixed material New Delhi Eurasia Publishing House 1961 Birkeland, Peter W. Primary Author mixed material 019503435x New York Oxford University Press 1984 Mallik, Tapas Kumar Primary Author mixed material 8124705380 Kolkata 13 Paschimbanga Rajya Pustak Parsad 2002 Srivastava, H.N. Primary Author mixed material New Delhi National Book Trust, India 1983 Wadia, D.N. Primary Author mixed material London Macmillan & Co LTD 1919 Krishnan, M.S. Primary Author mixed material New Delhi CBS Publishers & Distributors 1943 Dey, A.K. Primary Author mixed material New Delhi National Book Trust, India 1968 Sparks, B.W. Primary Author mixed material London Longmans, Green and Co. 1960 Ordway, Richard J. Primary Author mixed material New Delhi Affiliated East-West Press Pvt. Ltd. 1966 Lahee, F.H. Primary Author mixed material Delhi 32 CBS Publishers & Distributors 1987 Holmes, Arthur Primary Author mixed material London Thomas Nelson and Sons Ltd. 1944 Chattapadhayay, Pataki Krishna Primary Author mixed material Calcutta Paschimbanga Rajya Pustak Parsad 1976 Mathur, S.M. Primary Author mixed material 9788123710075 New Delhi National Book Trust, India 1986 Banerji, A.K. Editor Mukherjee, S. Editor Ghosh, A.K. Editor Sengupta, A. Editor Bhattacharyya, C. Editor mixed material Calcutta 06 Oxford & IBH Publishing Co. 1982 Sen, A.K. Primary Author Guha, P.K. Additional Author mixed material Kolkata- 73 Modern Book Agency PVT. LTD. 1981 Spencer, Edgar Winston Primary Author mixed material New Delhi Oxford & IBH Publishing Co. 1962