1. Proceedings of 2nd Intern ational Symposium on Field Screening Methods for Hazardous Wastes and Toxic Chemicals, Feb 12-14;HM Fribush,1991
2. G. A. Rabb, C. A. Kuharic, and W. H. Cole III, The Use of Field-Portable X-Ray Fluorescence Technology in the Hazardous Waste Industry,“ Advance in X-Ray Analysis, Vol. 33, 629–637, 1990.
3. “Field Portable X-Ray Fluorescence,” U.S.EPA Quality Assurance Technical Information Bulletin, Vol.!, No.4, May, 1991.
4. Proceedings of 12th World Conference on Non-Destru ctive Testing, Apr 23-28;PF Berry,1989
5. Proceedings of 2nd Intern ational Symposium on Field Screening Methods for Hazardous Wastes and Toxic Chemicals, Feb 12-14;JB Ashe,1991