00259nam a2200109Ia 4500008004100000041001200041082001100053100002400064245004900088260000600137650000600143221030s9999    xx            000 0 und d  aEnglish  a105.23  aP. K. Chattopadhyay 0aMathematical Physicscby P. K. Chattopadhyay  c0  aB