000 00244nam a22000857a 4500
008 210304b ||||| |||| 00| 0 eng d
050 _aQC244 .B49
245 _aPhysical ultrasonics
_cBEYER, ROBERT T.
942 _2lcc
_hQC244 .B49 1969
999 _c1546
_d1546