000 00259nam a2200109Ia 4500
008 160710s1957 xx 000 0 und d
100 _aSCHURT,ALEXANDER
245 _aWAVE PROPAGATION
260 _aNEW YORK
_bJ.F. RIDER
_c1957
300 _a56
942 _2ddc
_cB
999 _c22632
_d22632