00291nam a2200133Ia 45000030006000000080041000060400015000471000015000622450031000772500011001082600009001195460012001280050017001400STCL150530s9999 xx 000 0 und d aSTCLcSTCL aHart, W.W. aProgressive solid geometry aSecond c1943 aEnglish20220125170015.0