Seaborgium

ChemGlobe: Seaborgium
Electronic data and isotope table.
http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/106.html

ChemicalElements: Seaborgium
Basic information.
http://www.chemicalelements.com/elements/sg.html

EnvironmentalChemistry.com: Seaborgium
Atomic structure and table of nuclides.
http://environmentalchemistry.com/yogi/periodic/Sg.html

It's Elemental: Seaborgium
Basic physical and historical information.
http://education.jlab.org/itselemental/ele106.html

LANL: Seaborgium
Basic information and history.
http://periodic.lanl.gov/elements/106.html

Lenntech: Seaborgium
Physical data and chemical properties.
http://www.lenntech.com/Periodic-chart-elements/Sg-en.htm

Visual Elements: Seaborgium
Physical information, ionisation energies, and key isotopes.
http://www.chemsoc.org/viselements/pages/seaborgium.html

WebElements: Seaborgium
Information on history, isolation, and properties.
http://www.webelements.com/webelements/elements/text/Sg/key.html

Wikipedia: Seaborgium
History and basic information on the element.
http://en.wikipedia.org/wiki/Seaborgium