00251nam a2200109Ia 4500008004100000041001200041082001100053100001900064245004600083260000600129650000600135221030s9999    xx            000 0 und d  aEnglish  a105.23  aP. D. S. Verma 0aEngineeing Mathematicscby P. D. S. Verma  c0  aB