00303nam a2200133Ia 45000030006000000080041000060400015000471000028000622450030000902500011001202600009001315460012001400050017001520STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aDonald Stevenson Watson  aPrice theory and its uses  aSecond  c1970  aEnglish20220125170059.0