Sumnieng Ongsupankul. (2015) A Study of Relationship between Strength Activity Index and Cement Equivalence Factor of Fly ash. <i>SAU JOURNAL OF SCIENCE & TECHNOLOGY</i>, <i>1</i>(2), 1-14.Sumnieng Ongsupankul. "A Study of Relationship between Strength Activity Index and Cement Equivalence Factor of Fly ash". SAU JOURNAL OF SCIENCE & TECHNOLOGY 1 (2015):1-14.Sumnieng Ongsupankul. A Study of Relationship between Strength Activity Index and Cement Equivalence Factor of Fly ash. Southeast Asia University:ม.ป.ท. 2015.