Kaushik, Sanjay K. Dewey decimal classification : a practical manual of 23rd edition / Sanjay K. Kaushik - New Delhi : Ess Ess Publications , 2012. - xiii,253 p. ; 21 cm. ISBN: 9788170006725 750 Subjects--Topical Terms: DDC 23RD PRACTICEDDC PRACTICAL MANUAL Dewey Class. No.: 025.431 / KAU/D