000 002560000a22001210004500
245 _aSystems thinking
100 _aEmery, F.E., ed.
260 _aMiddlesex
_bPenguin
_c1981
500 _avol.2
080 _a65.012.2
_bE5
041 _aEN
942 _cBK
999 _c117221
_d117221