“COMPARATIVE STRENGTH OF PARTIALLY REPLACED RICE HUSK ASH WITH CEMENT MORTAR  A CASE STUDY OF OBUBRA L.G.A OF CROSS RIVER STATE: Akwapoly Journal of Communication and Scientific Research (APJOCASR)”. Akwapoly Journal of Communication & Scientific Research, vol. 7, no. 2, Sept. 2024, pp. 97-107, https://akwapolyjournal.org/index.php/apjocasr/article/view/31.