Langwell W H. <br/><br/>
Conservation of books and documents 

 -  1957 
<br/><br/><label>Standard No.: </label>6,660 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LIBRARY SCIENCE
<br/><br/><label>Dewey Class. No.: </label>2;43:88, J7 (2D)