000 00322nam a2200157Ia 4500
082 _a029.7
_bV637.IS
100 _aVickery, B. C.
245 _aInformation systems
_b
260 _aLondon
_bButterworths
_c1973
300 _axii, 350p.
500 _a
690 _a
700 _a
964 _a
_b
_c
_d
_e
_f
_g
921 _a435
999 _c435
_d435