Narain, Gopal; Mishra, Geeta; Shukla, P. R., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1984, vol. 23, # 3, p. 253 - 255
Narain, Gopal; Mishra, Geeta; Shukla, P. R., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1984, vol. 23, # 3, p. 253 - 255