00408nam a22001577a 4500 230502b |||||||| |||| 00| 0 eng d National Science Library National Science Library 681.8 K4 Mackenzie, G W Acoustics New York: Focal Presaa, 1964 224p. Industries Microphones udc REF 26075 26075 0 0 udc 0 6818_K4 0 REF 38250 NSL NSL GF/RK-21/C-8/R-3 1967-08-01 0 681.8 K4 20193 2023-05-02 00:00:00 1967-08-01 REF