00334nam a2200133Ia 45000030006000000080041000060400015000471000026000622450063000882500011001512600009001625460012001710050017001830STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBurn, J.; Brown, E.H.  aElements of finite differences also solutions to questions  aSecond  c1915  aEnglish20220125170037.0