Şablon:AtWt TICE 1997
Rosman, K. J. R.; Taylor, P. D. P. (1998), "Isotopic Compositions of the Elements 1997" (PDF), Pure and Applied Chemistry, 70 (1), s. 217–35, doi:10.1351/pac199870010217
Rosman, K. J. R.; Taylor, P. D. P. (1998), "Isotopic Compositions of the Elements 1997" (PDF), Pure and Applied Chemistry, 70 (1), s. 217–35, doi:10.1351/pac199870010217