- Visual Elements: Samarium - http://www.chemsoc.org/viselements/pages/samarium.html
- Image, source, uses, physical information, and key isotopes.
- ChemicalElements.com: Samarium - http://www.chemicalelements.com/elements/sm.html
- Basic information, atomic structure, and isotopes table.
- It's Elemental: Samarium - http://education.jlab.org/itselemental/ele062.html
- Basic physical and historical information.
- EnvironmentalChemistry.com: Samarium - http://environmentalchemistry.com/yogi/periodic/sm.html
- Atomic structure, chemical and physical properties, and table of nuclides.
- Lenntech: Samarium - http://www.lenntech.com/periodic-chart-elements/sm-en.htm
- Physical data, chemical properties, health and environmental effects.
- Wikipedia: Samarium - http://en.wikipedia.org/wiki/samarium
- Properties of the element, including its history, applications, and characteristics.
- LANL: Samarium - http://periodic.lanl.gov/elements/62.html
- Sources, properties, isotopes, and uses.
- ChemGlobe: Samarium - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/62.html
- Electronic, thermal, and steric data along with an isotope table.
- WebElements: Samarium - http://www.webelements.com/webelements/elements/text/sm/key.html
- Extensive information on history, uses, occurrence, compounds, and properties.
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