000 00348nam a2200145Ia 4500
008 220926s9999 xx 000 0 und d
100 _aAlexis Leon
245 0 _aInformation Systems
250 _a2nd Ed
260 _aNew Delhi
260 _bMcGraw Hill International Editions
260 _c1987
650 _aInformation Systems
942 _cBK
999 _c13157
_d13157