00339    a2200121   4500082001500000100002100015245004300036260004700079300002300126650001600149650002800165650002400193  a511.8bROS  aRosko, Joseph S.  aDigital simulation of physical systems  aMassachusettsbAddison - Wsleyc1972g1972  aviii, 427p.c24cm.  aMATHEMATICS  aMATHEMATICAL SIMULATION  aMATHEMATICAL MODELS