TY - BOOK AU - Niyonzima, Bernard. TI - Determining the Optimal Amount of Portland Cement to be Replaced by Volcanic Ash in Concrete / U1 - D624.1834 23 PY - 2015/// CY - S.I. PB - s.n. KW - Concrete N1 - Includes appendices; Thesis (B.A) - Uganda Christian University, 2015; Includes bibliographical references (p. 48-50) ER -