Srinivasan , P., G.A. Balasubramaniam, T.R. Gopalakrishnamurthy, and P. Balachandran. 2012. “Pathology of Oviduct in Sub Optimally Producing Commercial Layer Chicken”. International Journal of Poultry Science 11 (9): 577–581. https://doi.org/10.3923/ijps.2012.577.581.