Describir: The influence of the envelope in the preventive conservation of books and paper records : Case study: Libraries and archives in La Plata, Argentina

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