Raheem, KA, NVS Uchechukwu, E Odirichukwu, and O Onyegbulam. 2016. “Placenta Retention in the Cow: Report of Three Cases”. Sokoto Journal of Veterinary Sciences 14 (2):72-76. https://doi.org/10.4314/sokjvs.v14i2.11.