00293nam a2200121Ia 4500082001900000100001600019245004700035260002500082300001600107490003800123500000500161700000500166  a515.35bJ46.QH  aJeffrey, A.  aQuasilinear hyperbolic systems and wavesb  aLondonbPitmanc1977  a230p. Index  aResearch notes in Mathematicsv 5  a  a