Batty, C. D. <br/><br/>
An introduction to the twentieth edition of the dewey decimal classification / 
David Batty. 
 - London :  Clive Bingley,  1992. 
 - 184 p. ;  22 cm. 
<br/><br/><label>ISBN: </label>0910608458  RM124.20 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification, Dewey decimal--Programmed instruction.