@article {6600,
	title = {"On  the  Passive  Film Formed on  Zirconium  in  Nitric and Sulphuric acid  Solutions" },
	journal = {Bull. Faculty of Sci., Univ. Cairo},
	volume = {59},
	year = {1991},
	pages = {269-289},
	author = {- W. A. Badawy and S. M. Abd El- Metaal and N. H. Hilal}
}
