O’Keefe, John, and John Bradley. “Acoustical Renovation of the Orpheum, Vancouver. I. Measurements Prior to Renovation”. Canadian Acoustics 28, no. 1 (March 1, 2000): 21-31. Accessed June 25, 2021. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1261.