Mako, A. A., Mosuro, A. O., Adedeji, B. S., Jemiseye, F. O. and Abokede, T. (2020) “Comparative use of oyster shell and limestone as sources of calcium in the diet of laying chickens”, Nigerian Journal of Animal Production, 44(1), pp. 275–281. doi: 10.51791/njap.v44i1.804.