00302nam a2200121Ia 4500082001900000100001900019245003500038260002800073300001900101490005000120500000500170700000500175  a530.2bW596.LW  aWhitham, G. B.  aLectures on wave propagationb  aNew DelhibNarosac1979  av, 148p. Bibl.  aTIFR Lectures on Mathematics and Physicsv 61  a  a