Majd, F. F. and Nassiri, P. (2008) “The evaluation of noise level in hand-held pneumatic tools (rock drill) by ‘pneurop cagi test code’ method”, Canadian Acoustics, 36(3), pp. 48–49. Available at: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2031 (Accessed: 3 December 2021).