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Born in April 1945, Dr. Birendra Prasad has a brilliant academic record. From Matriculation upto M.A. the author has always been a first class degree holder. Joined D.A.V. College, Siwan in 1967 and again joined Post-Graduate Department of History, Magadh University, Bodh Gaya in early 1968. Since then he is teaching Post-Graduate students. Secured Ph.D. degree in 1976 on the thesis entitled “Indian Nationalism and Asia, 1900-1947”, From Magadh University, Bodh Gaya, Bihar. The author has several research papers to his credit. His another book captioned “Readings in Indian Historiography” is to come out very soon.

Dr. R.K. Tiwari, Deputy Director at the National Geophysical Research Institute (NGRI), Hyderabad, obtained his Ph.D. degree in Geophysics in 1985, from the Banaras Hindu University, Varanasi. He is presently leading a project on the time series analysis and modeling of palaeoenvironmental dynamics. He was the DAAD fellow at the University of Kiel, Germany, during 1985-87 and visiting scientist at the University of Bonn, Germany in 1999. he has published several works (over 50 papers) on periodicities, predictability and chaos on varied geophysical topics in national and international journals. Dr. Tiwari is recipient of Krishnan Gold Medal of Indian Geophysical Union (1987) for his significant contributions in geophysics. He is fellow of IGU and GSI.