Erbe, C., and D.M. Farmer. “An Experimental Approach to Evaluation of Acoustic Masking of Beluga Communication by Ship Noise”. Canadian Acoustics 22, no. 3 (September 1, 1994): 155-156. Accessed May 17, 2021. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/896.