N. D. Vilayatkar, Department of Chemistry, S. S. J. College, Arjuni/Mor, India.
P. K. Rahangdale, Department of Chemistry, B.M.V. College, Amgaon, India.
R. S. Ukare, Department of Physics, C. J. Patel College, Tirora, India.
S. S. Shende, Department of Chemistry, Late N. P. W. College, Lakhni, India.
R. R. Kurzekar, Department of Chemistry, C. J. Patel College, Tirora, India.