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  ____       ___      _____      ___      ______  
 |  _ \\    / _ \\   /  ___||   / _ \\   /_   _// 
 | |_| ||  | / \ || | // __    | / \ ||  `-| |,-  
 | .  //   | \_/ || | \\_\ ||  | \_/ ||    | ||   
 |_|\_\\    \___//   \____//    \___//     |_||   
 `-` --`    `---`     `---`     `---`      `-`'

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