000 00366n a2200169 a 4500
000 B B
001 006500
005 20220201171642.0
082 _a004
_bN0 COM
100 _aKumar, P S G
245 _aPractical Guide to DDC 20
250 _a1st
260 _aNagpur
_bDatt Sons
_c1990
300 _a246p.
690 _aComputer Science
908 _aG
999 _c6500
_d6500