000 00261nam a22000977a 4500
008 120721b xxu||||| |||| 00| 0 eng d
050 _aQC21
_b.T46 1963
245 _aGENERAL PHYSICS AND SOUND
300 _a18CM
942 _2lcc
_cBK
_hQC21.T46 1963
999 _c65151
_d65151