00358nam a2200121Ia 4500008004100000082001500041100001600056245003300072260004200105300001000147630001800157650006100175211109s9999||||xx |||||||||||||| ||und||  a330bROL-E  aRoll, Erich 0aElements of Economics Theory  bOxford University PressaLondonc1937  a276p.  xGeneral Stack  aSOCIAL SCIENCESvECONOMICSTHEORY OF ECONOMICSxEconomics