Şablon:AtWt IAV
Coplen, T. B.; ve diğerleri. (2002), "Isotopic Abundance Variations of Selected Elements" (PDF), Pure and Applied Chemistry, 74 (10), ss. 1987–2017, doi:10.1351/pac200274101987
Coplen, T. B.; ve diğerleri. (2002), "Isotopic Abundance Variations of Selected Elements" (PDF), Pure and Applied Chemistry, 74 (10), ss. 1987–2017, doi:10.1351/pac200274101987