Dr. J.R.Kayal
  Emeritus Scientist
  Indian School of Mines University (ISMU)
  Dhanbad-826004
  Jharkhand

  Dr. B. Nagarajan
  Director, Geodetic and Research Branch
  Survey of India
  17 E.C.Road
  Dehradun-248001

  Professor Debendra Kumar Nayak
  Department of Geography
  North-Eastern Hill University
  Shillong-793022
  E-mail: dknak@rediffmail.com

  Dr. R.B.Singh
  Department of Geography
  Delhi School of Economics
  University of Delhi
  Delhi-110007
  E-mail: rbsgeo@hotmail.com / rbsgeo1@yahoo.com

  Dr. V.M.Tiwari
  Scientist C
  National Geophysical Research Institute (NGRI)
  Uppal Road
  Hyderabad-500 007
  E-mail: vmtiwari@ngri.res.in