- Visual Elements: Lanthanum - http://www.chemsoc.org/viselements/pages/lanthanum.html
- Image, appearance, source, uses, and general and physical information.
- It's Elemental: Lanthanum - http://education.jlab.org/itselemental/ele057.html
- Basic physical and historical information.
- ChemicalElements.com: Lanthanum - http://www.chemicalelements.com/elements/la.html
- Basic information, atomic structure, and isotopes.
- EnvironmentalChemistry.com: Lanthanum - http://environmentalchemistry.com/yogi/periodic/la.html
- Atomic structure, chemical and physical properties, and table of nuclides.
- Lenntech: Lanthanum - http://www.lenntech.com/periodic-chart-elements/la-en.htm
- Physical data, chemical properties, health and environmental effects.
- Wikipedia: Lanthanum - http://en.wikipedia.org/wiki/lanthanum
- Properties of the element, including its history, applications, and characteristics.
- LANL: Lanthanum - http://periodic.lanl.gov/elements/57.html
- Sources, properties, isotopes, and uses.
- ChemGlobe: Lanthanum - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/57.html
- Electronic, steric, and thermal data along with an isotopes table.
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