00293nam a2200121Ia 45000030006000000080041000060400015000471000034000622450037000962600009001335460012001420050017001540STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aDemidovich, B.; Yankovsky, G.  aProblems in mathmatical analysis  c1964  aEnglish20220125165957.0