000 00245nam a2200097 4500
245 _aInformation systems
_cB. C. Vickery
100 _aVickery, B. C.
260 _aLondon
_bButterworths
_c1973
300 _a[x], 350p.; 23cm.
082 _aLib
_b029.7 VIC
999 _c33734
_d33734