000 00264nam a2200097 4500
245 _aCybernatics simplified
_cArthur Porter
100 _aPorter, Arthur
260 _aLondon
_bThe English Universidty Press
_c1969
300 _ax,159p.:ill.; 20cm.
082 _a001.53
_bPOR
999 _c82672
_d82672