Polytungstates Europe

1. Chem Soc's visual periodic table of the elements, or more directly here.

2. British Geological Survey

3. Heavyliquids.com - supplies LST heavy liquids in the USA.

4. Article on Biostratigraphy and Geochronology

5. Pangea UK - provides geological materials and supplies for research and education.

6. Background on organic and tungstate heavy liquids

7. Scottish Universities Research and Reactor Centre

8. Centre for Isotope Research, University of Groningen, Netherlands

9. Stable Isotope Laboratory, Erlangen, Germany

10. Central Chemical Consulting - LST heavy liquids in Australia

11. Isogeochemistry - the isogeochem list web page

12. Mineralogy database on the web - extensive web information on minerals