000 00245nam a2200097 4500
245 _aDemand and supply
_cRalph Turvey
100 _aTurvey, Ralph
260 _aLondon
_bGeorge Allen and Unwin
_c1971
300 _a127p.; 20cm.
082 _a338.521
_bTUR
999 _c20813
_d20813