1. IARC, Department of Earth Science and Engineering, Imperial College London, London SW7 2AZ, UK.
2. Astronomical Institute of the Academy of Sciences, Fričova 298, CZ-251 65 Ondřejov Observatory, Czech Republic.
3. Department of Earth and Planetary Sciences, Western Australian Museum, Locked Bag 49 Welshpool DC, Western Australia 6986, Australia.
4. Space and Atmospheric Physics Group, Department of Physics, Imperial College London, London SW7 2AZ, UK.
5. Southwest Research Institute, 1050 Walnut Street, Suite 426, Boulder, CO 80302, USA.
6. PSSRI, Open University, Walton Hall, Milton Keynes MK7 6AA, UK.
7. Solar System Dynamics Group, Jet Propulsion Laboratory, M/S 301-150, Pasadena, CA 91109, USA.
8. Office of Research and Development, Curtin University of Technology, GPO Box U1987, Perth, Western Australia 6845, Australia.
9. Post Office Box 187, Nedlands, Perth, Western Australia 6909, Australia.
10. IARC, Department of Mineralogy, Natural History Museum, London SW7 5BD, UK.
11. CSIRO Exploration and Mining, CRCLEME, ARRC, 26 Dick Perry Avenue, Kensington, Perth, Western Australia 6151, Australia.