00261nam a2200121Ia 45000030006000000080041000060400015000471000016000622450023000782600009001015460012001100050017001220STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aGulati,S.L.  aI.I.T. mathematics  c1996  aEnglish20220125165822.0