000 00271nam a2200109Ia 4500
008 201231s9999 xx 000 0 und d
100 _aDas, Sumitabha
245 0 _aUNIX : Concepts and Applications
260 _aNew Delhi
_bTata McGraw-Hill
300 _a565
942 _cBK
999 _c10264
_d10264