Data from Atomic Weights and Isotopic Compositions ed . J. S. Coursey , D. J. Schwab and R. A. Dragoset , National Institute of Standards and Technology ( 2005 ) .
Data from Isotopic Weights and Atomic Compositions ed . J. S. Coursey , D. J. Schwab and R. A. Dragoset , National Institute of Standards and Technology ( 2005 ) .