Singh, Ram Niwas. Studies on the reactivity of pyridinium poly (Hydrogen Fluoride) and a few fluorocomplexes /by Ram Niwas Singh - Bangalore IISc. 1994 - x, 232p - I.I.Sc., Dept. of IPC, Ph.D., Thesis . Dewey Class. No.: 546.73125 / N94 "THESIS"