000 00265nam a2200097 4500
245 _aConcept of class : an historical introduction
_cPeter Calvert
100 _aCalvert, Peter
260 _aLondon
_bHutchinson
_cc1982
300 _a254p.; 23cm.
082 _a301.4401
_bCAL
999 _c41963
_d41963