Kozlowski, Corinne P, Helen L Clawitter, Cheryl S Asa, Michael S Macek, Timothy L Snyder, and Anne M Tieber. “Patterns of Fecal Steroids Associated With Reproduction in Two Cracidae Species: The Blue-Throated Piping Guan (Pipile Cumanensis Cumanensis) and the Horned Guan (Oreophasis Derbianus)”. Journal of Zoo and Aquarium Research 6, no. 3 (July 31, 2018): 85–90. Accessed April 19, 2024. https://jzar.org/jzar/article/view/351.