Adekunle, A.A. et al. 2020. Effect of Ammonium on the Hydraulic Conductivity of Kaolin and Bentonite as Clay Liners: Effect of Ammonium on the Hydraulic Conductivity of Kaolin and Bentonite as Clay Liners. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA. 4, 2 (Dec. 2020), 100–111. DOI:https://doi.org/10.29114/ajtuv.vol4.iss2.177.