000 00332nam a22001337a 4500
020 _a771574193
082 _a620.2 HUT
100 _aHUTCHISON, D. E
245 _aSound waves /
_cE. D. Hutchison
260 _aOntario
_bGage educational publishing limited
_cc1975
300 _a80p.:
_bill.;
500 _ainclude index
942 _cBK01
999 _c5825
_d5825