000 00301 a2200121 4500
080 _a681.14
_bC 463 C
245 1 _aComputers
_bA systems approach
_cby N. Chapin
260 _aNew York
_bVan Nostrand Reinhold
_c1971
650 _aComputer
100 1 _aChapin, N.
_d
300 _a686 p.
901 _a109889
999 _c52567
_d52567