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Dr. Vinod Kumar is a Lecturer of Geography in Government Post-graduate College, Sirohi, Rajasthan (India).  He did his Post-graduation from JNV University, Jodhpur and obtained his M.Phil. and Ph.D. from University of Rajasthan, Jaipur.  A Gold-medalist in M.A. as well as in M.Phil.  He has more than 25 years of teaching experience.  He has done significant work on Environmental Geography, Climate of Western Rajasthan and Patterns of Energy Use.  He has many research papers on the contemporary geographical issues to his credit.

B.P. Singh is presently Professor, Department of Electronics & Communication Engg., Madan Mohan Malviya Engg. College, Gorakhpur. He did B.Sc. (Engg.) in 1967 from Bihar Institute of Technology, Sindri, Dhanbad and M.Sc. (Engg.) and Ph.D. in 1970 and 1980, respectively, from Birla Institute of Technology, Mesra, Ranchi under Ranchi University, Ranchi. He served B.I.T. Mesra, Ranchi from July 1967 to May 1981, Indian School of Mines, Dhanbad from June 1981 to August 1987. He served Regional Engineering College, Silchar, Assam from July 1985 to August 1987.