Describir: An introduction to metallurgy

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