Chaudury, S., M. S. Ansari, M. N. Abbas, S. Kausar, R. Iqbal, R. Saleem, J. Iqbal, and S. Sabir. 2017. “Toxic Effects of Chlorpyrifos on 12th Day Desi Chick Embryo (Gallus Gallusdomesticus)”. The Nucleus 54 (2):135-39. http://www.thenucleuspak.org.pk/index.php/Nucleus/article/view/73.