Batty, David. <br/><br/>
An introduction to the twentieth edition of the Dewey decimal classification / 
David Batty. 
 - Albany, N.Y. :  Forest Press,  1990. 
 - xvi, 195 p. 
<br/><br/><label>ISBN: </label>0910608458 
<br/><br/><label>LCCN: </label>93014245     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification, Dewey decimal.<br/>Classification--Books.