Swain, B. K., Naik, P. K., Sahoo, S. K., Mishra , S. K., & Kumar, D. (2018). Effect of Feeding of Azolla (Azolla pinnata) on the Performance of White Pekin Laying Ducks. International Journal of Livestock Research, 8(8), 248–253. Retrieved from http://ijlr.org/ojs_journal/index.php/ijlr/article/view/1668