1. Physics Department, H. V. H. P. Institute for P.G. Studies and Research, Kadi, India
2. Physics Department, M. N. College, Visnagar, India
3. V. P. & R. P. T. P. Science College, S. P. University, Vallabh Vidyanagar, India
4. Applied Physics Department, The M.S. University of Baroda, Vadodara, India