00469nam a22001697a 4500 230503b |||||||| |||| 00| 0 eng d National Science Library National Science Library 681.854 K4 Guy, P J 8198 Disc recording and reproduction London: Focal Press Limited, 1964 232p. 42.00 INR Industries Microphones udc REF 26503 26503 0 0 udc 0 681854_K4 0 REF 38931 NSL NSL GF/Rk-21/C-9/R-6 1967-05-01 42.00 0 681.854 K4 20194 2023-05-03 00:00:00 1967-05-01 REF