- ChemGlobe: Lanthanum
- Electronic, steric, and thermal data along with an isotopes table.
- ChemicalElements.com: Lanthanum
- Basic information, atomic structure, and isotopes.
- EnvironmentalChemistry.com: Lanthanum
- Atomic structure, chemical and physical properties, and table of nuclides.
- It's Elemental: Lanthanum
- Basic physical and historical information.
- LANL: Lanthanum
- Sources, properties, isotopes, and uses.
- Lenntech: Lanthanum
- Physical data, chemical properties, health and environmental effects.
- Visual Elements: Lanthanum
- Image, appearance, source, uses, and general and physical information.
- Wikipedia: Lanthanum
- Properties of the element, including its history, applications, and characteristics.
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