Chakrapani, G Spectrophotometric method for the determination of vanadium in uranium rich hydrogeochemical samples using pyridyl azo resorcinol (PAR). [electronic resource] - Talanta Apr 1993 - 541-4 p. digital Publication Type: Journal Article ISSN: 0039-9140 Standard No.: 10.1016/0039-9140(93)80014-i doi