Kennedy, D. S., and E. R. Welbourne. “A Comparison of Two Staionary Measurement Procedures for Truck Exterior Levels”. Canadian Acoustics 8, no. 3 (July 1, 1980): 31–39. Accessed September 26, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/442.