1. Ultimate analyses of coal and coke;American Society of Testing Materials, D3176-74,1979
2. Test for nitrogen in the analysis sample of coal and coke;American Society of Testing Materials D3178-73,1979
3. Accurate quantitative analysis of oxygen and nitrogen with a WSi multilayer crystal;Armstrong,1988
4. Effects of carbon coat thickness and contamination on quantitative analysis: a new look at an old problem;Armstrong,1993
5. LSM X-ray reflection crystals for light element analysis in electron microprobes;Barbee,1986