000 00285nam a22001337a 4500
020 _a9780070635463
082 _bDAS
100 _aDas Sumitabha
245 _aUnix Concepts and application
250 _a4th
260 _aChennai
_bMcgraw hill
_c2016
300 _axxi, 671p
942 _cBK
999 _c853
_d853