By Lawler J E   Hartog E A   Sneden C   Cowan J J   in Canadian Journal of Physics

ISSN:1208-6045|86|8|1033-1038

NRC Research Press‎(2008)‎

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By Kratz K.-L.   Pfeiffer B.   Cowan J.J.   Sneden C.   in New Astronomy Reviews

ISSN:1387-6473|48|1|105-108

Elsevier‎(2004)‎

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