1. Separation and chemical characterization of finely-sized fly ash particles;Cambell;Anal. Chem.,1978
2. Some aspects of the chemistry of fly-ash surfaces;Collin,1974
3. Trace elements in fly ash: dependence of concentration on particle size;Davison;Environ. Sci. Technol.,1974
4. Soil survey of Douglas County, Kansas;Dickey;U.S. Dep. Agric., Soil Conserv. Serv.,1977
5. Proceedings of the Fourth International Ash Utilization Symposium,1976