Universal decimal classification    U D C 54  Chemistry crystallography mineralogy.  

 - London  British Standard Institution  1972 
 - 120p.; 26cm. 
<br/><br/><label>ISBN: </label>580074781 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification scheme - Library Science<br/>U D C.
<br/><br/><label>Dewey Class. No.: </label>025.432  / U4U2