00349nam a2200109Ia 4500008004100000082002000041100003000061245005000091260003600141300002700177490003500204260420b        |||||||| |||| 00| 0 eng d  a530.1bSa211.NH  aSanchez-Palencia, Enrique  aNon-homogeneous media and vibration theoryb/  aBerlin:bSpringer-Verlag,c1980  aix, 398p. Index, Bibl.  aLecture notes in Physicsv 127