Measurement of Atomic Fractions in Multi-Phased Materials of Limited Mass $via$ an Empirical Approach to EXAFS Modeling V.G. Harris, S.A. Oliver, J.D. Ayers and B.N. Das J. Phys. III France, 7 12 (1997) 2475-2478 DOI: 10.1051/jp3:1997270