Dubnium
Links
Visual Elements: Dubnium
http://www.chemsoc.org/viselements/pages/dubnium.html
Image, general and physical information, and key isotopes.
ChemicalElements.com: Dubnium
http://www.chemicalelements.com/elements/db.html
Diagram of its atomic structure, and basic information.
It's Elemental: Dubnium
http://education.jlab.org/itselemental/ele105.html
Basic physical and historical information.
EnvironmentalChemistry.com: Dubnium
http://environmentalchemistry.com/yogi/periodic/Db.html
Atomic structure, physical properties, and table of nuclides.
WebElements: Dubnium
http://www.webelements.com/webelements/elements/text/Db/key.html
Information on history, isolation, and properties.
Lenntech: Dubnium
http://www.lenntech.com/Periodic-chart-elements/Db-en.htm
Physical data and chemical properties.