00341nam a2200121Ia 4500008004100000082002300041100002200064245003900086260002700125300001000152600002100162650003600183140224s9999    xx            000 0 und d  a51:531.3(086.5) M7  aBeltrami, Edward.  aMathematics for dynamic modelling.  aLondonbAcademicc1987  a277p.  aEdward  Beltrami  aMathematical models,Mathematics