Bisset, A. R., and R. S. Rempel. “LINEAR ANALYSIS OF FACTORS AFFECTING THE ACCURACY OF MOOSE AERIAL INVENTORIES”. Alces: A Journal Devoted to the Biology and Management of Moose, vol. 27, Jan. 1991, pp. 127-39, https://www.alcesjournal.org/index.php/alces/article/view/1111.