Text this: Study of aging behavior of 9/70/30 and 9/65/35 PLZT by optical interferometric technique

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