Srivastava, T. N.; Srivastava, R. C.; Singh, Mala, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1980, vol. 19, # 5, p. 435 - 437
Srivastava, T. N.; Srivastava, R. C.; Singh, Mala, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1980, vol. 19, # 5, p. 435 - 437