000 00245nam a2200121Ia 4500
100 _aDavid P
245 _aPropagation of waves
250 _a1
260 _c1969
_bPERGAMON PRESS
_aLondon
300 _aviii+329
700 _aVoge J
942 _cBK
999 _c4525
_d4525