00345nam a2200133 a 450000500170000002000150001708200180003210000170005024500310006726000310009830000260012949000330015563000230018820251203090448.0  a0471940909  a531.1133bWHI  aWhitham, G.B  aLinear and nonlinear waves  aNew YorkbJohn-Wileyc1974  axvi,636 p.b22cm.cPB  aPure and applied mathematics  aWave motion theory