http://www.accuratus.com/alumox.html

http://en.wikipedia.org/wiki/Aluminum_oxide

http://www.alcoa.com/primary_na/en/product_category.asp?cat_id=1678

http://www.answers.com/topic/aluminium-oxide

http://www.answers.com/topic/aluminium

http://www.chemicalland21.com/industrialchem/inorganic/ALUMINUM%20OXIDE.htm

http://www.aluminumoxide.org/

http://www.lenntech.com/periodic/elements/al.htm

http://www.keytometals.com/Article76.htm

http://www.galleries.com/minerals/oxides/spinel/spinel.htm

http://www.elmhurst.edu/~chm/vchembook/102aluminum.html

http://www.aps.anl.gov/Science/Highlights/2003/molten_aluminum.htm