ChemGlobe: Lithium
- Electronic, thermal, and steric data along with basic information.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/3.html

LANL: Lithium
- History, sources, uses, and cost.
- http://periodic.lanl.gov/elements/3.html

Wikipedia: Lithium
- Properties of the element, including its history, applications, and characteristics.
- http://en.wikipedia.org/wiki/Lithium

Lenntech: Lithium
- Physical data, chemical properties, health and environmental effects.
- http://www.lenntech.com/Periodic-chart-elements/Li-en.htm

EnvironmentalChemistry.com: Lithium
- Atomic structure, chemical and physical properties, and table of nuclides.
- http://environmentalchemistry.com/yogi/periodic/Li.html

Corrosionsource.com: Lithium
- History, properties, sources, and uses.
- http://www.corrosionsource.com/handbook/periodic/3.htm

USGS Minerals Information: Lithium
- Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
- http://minerals.usgs.gov/minerals/pubs/commodity/lithium/

ChemicalElements.com: Lithium
- Basic information, atomic structure, and table of isotopes.
- http://www.chemicalelements.com/elements/li.html

It's Elemental: Lithium
- Basic physical and historical information.
- http://education.jlab.org/itselemental/ele003.html

Visual Elements: Lithium
- Image, general and physical information, and key isotopes.
- http://www.chemsoc.org/viselements/pages/lithium.html