Sondergaard, J., Meinke, D. K., Stewart, M., Finan, D. S., Lankford, J., & Flamme, G. A. (2011). Impulse noise levels generated by A.22 caliber starter pistol. Canadian Acoustics, 39(3), 102–103. Retrieved from https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2431