Fraay, A. L. A. (1990). Fly ash a pozzolan in concrete. Technická univerzita.
Chicago Style (17th ed.) CitationFraay, Alex Leo Ad. Fly Ash a Pozzolan in Concrete. Delft: Technická univerzita, 1990.
MLA (9th ed.) CitationFraay, Alex Leo Ad. Fly Ash a Pozzolan in Concrete. Technická univerzita, 1990.
Warning: These citations may not always be 100% accurate.