STUDIES ON EXPERIMENTAL MODELS USED FOR NUTRITIONAL AND BIOLOGICAL RESEARCH: A TECHNIQUE OF PERMANENT INSTALLATION OF RUMEN CANNULAE IN THE NIGERIAN CATTLE . Nigerian Journal of Animal Production [Internet]. 2021 Jan. 16 [cited 2026 Nov. 13];14:19-24. Available from: https://njap.org.ng/index.php/njap/article/view/2602