Permanence - durability of the book.   Libro  Vol. II [-Vol. V] / 
W. J. Barrow Reseach Laboratory.  
 - Virginia :   W. J. Barrow Reseach Laboratory,   1964-1967.  
 - 3 v. (79; 62; 116 p.) ;   23 cm.  
<br/><br/> Catalogación preliminar.  Contiene : 1. Test data of naturally aged papers II - 2. Spray deacidificación III - 3. Strength and other characteristics of book papers 1800-1899 V.