000 00351nam a2200157Ia 4500
003 LDD
020 _a710073968
040 _cLDD
082 _a306.44 C568
245 0 _aClass, codes and control
260 _aLondon
_bRoutledge and Kegan Paul
_c1973
300 _aix,377p.
901 _a325
_b16-03-1996
903 _bGifted by : CCI
942 _2ddc
_cG
999 _c9767
_d9767