00297nam a2200133Ia 45000030006000000080041000060400015000471000022000622450030000842500011001142600009001255460012001340050017001460STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aDonald Watson, S.  aPrice theory and its uses  aSecond  c1968  aEnglish20220125165610.0