1. The Strength Relationship of Concrete under Tropical Conditions;Quao;RILEM Bulletin No. 24,1964
2. An Investigation of the Crushing Strengths of Concrete Made with Three Different Cements in Nigeria;Ackroyd,1964
3. An Investigation into the Manufacture of High-Strength Concrete in a Tropical Climate;Ridley,1959
4. Design of Concrete Mixes;D.I.S.R. Road Research Laboratory,1950
5. Factors Influencing Concrete Strength;Price;ACI Journal,1951