Havelock, David I., Michael R. Stinson, and Gilles A. Daigle. “Measurement of Sound Field Statistics Near the Ground With a Large Outdoor Array”. Canadian Acoustics 24, no. 3 (September 1, 1996): 47-47. Accessed June 25, 2021. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1020.