@book{whitham:1974:lnw,
    author = {Whitham, G. B.},
     title = {Linear and Nonlinear Waves},
 publisher = {John Wiley \& Sons},
   address = {New York},
      year = {1974},
     pages = {xvi+636},
      note = {Reprinted in 1999.},
   mrclass = {76.00 (35L05 35Q99)},
  mrnumber = {MR0483954 (58 \#3905)},
      isbn = {0471359424},
     zblno = {0373.76001}}