00293nam a2200109 a 450000500170000002000150001708200170003210000170004924500490006626000420011530000260015720251203110908.0  a817000165X  a025.431bSEH  aSehgal, R.L.  aIntroduction to dewey decimal classification  aNew DelhibEss Ess Publicationsc2002  aix, 294 p.c24 cm. HB