Describir: Classification and indexing in science /

 ______      ___      _____     _____    _____       ___     _    _   
|      \\   / _ \\   |__  //   |  ___|| |  __ \\    / _ \\  | || | || 
|  --  //  | / \ ||    / //    | ||__   | |  \ ||  | / \ || | || | || 
|  --  \\  | \_/ ||   / //__   | ||__   | |__/ ||  | \_/ || | \\_/ || 
|______//   \___//   /_____||  |_____|| |_____//    \___//   \____//  
`------`    `---`    `-----`   `-----`   -----`     `---`     `---`   
                                                                      
 _    _   
| || | || 
| || | || 
| \\_/ || 
 \____//  
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