1. Precision Visuals Inc, 6230 Lookout Road, Boulder, Colorado 80301, USA.
2. Total quantitative recording of elemental maps and spectra with a scanning microprobe
3. A.J. Antolak, G.S. Bench and A.M. Friz, in preparation.
4. PIXAN: The Lucas Heights PIXE analysis computer package;Clayton,1986
5. Data Reduction and Error Analysis for the Physical Sciences;Bevington,1969