Okonkwo C, Iwuamadi F, Sanda M, Igwe A. Vaccination indices and concomitant serological status of Newcastle disease in chickens in Aba and Umuahia of Abia State. Sokoto J. Vet. Sc. [Internet]. 2022 May 16 [cited 2026 Sep. 21];20(1):35-41. Available from: https://www.ajol.info/index.php/sokjvs/article/view/225287