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  _  _    __   __   _    _     ______  __    __  
 | \| ||  \ \\/ // | |  | ||  /_   _// \ \\ / // 
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 |_|\_||    |_||   |_// \_||  /_____//    \//    
 `-` -`     `-`'   `-`   `-`  `-----`      `

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Text this: Stable isotope geochemistry. (6th ed.)