APA Citation

Helmuth, R., & Helmuth, R. (1987). Fly ash in cement and concrete. Illinois: Portland Cement Association.

Chicago Style Citation

Helmuth, Richard, and Richard Helmuth. Fly Ash in Cement and Concrete. Illinois: Portland Cement Association, 1987.

MLA Citation

Helmuth, Richard, and Richard Helmuth. Fly Ash in Cement and Concrete. Illinois: Portland Cement Association, 1987.

Warning: These citations may not always be 100% accurate.