Indu, V. R., K. M. Lucy, A. R. Sreeranjini, S. Maya, N. Ashok, and J. J. Chungath. 2014. “Gross and Histological Studies on the Harderian Gland of White Pekin Ducks (Anas Platyrhynchos)”. Indian Journal of Veterinary Anatomy 26 (1). https://epubs.icar.org.in/index.php/IJVA/article/view/41350.