Bahl B. S. A., . (1966). Comprehenseive inorganic chemistyr. : Ram Chand.
Bahl B.S Sharma A.N, . 1966. Comprehenseive inorganic chemistyr. : Ram Chand.
Bahl B.S Sharma A.N, . Comprehenseive inorganic chemistyr. : Ram Chand. 1966.