ChemGlobe: Samarium
- Electronic, thermal, and steric data along with an isotope table.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/62.html

LANL: Samarium
- Sources, properties, isotopes, and uses.
- http://periodic.lanl.gov/elements/62.html

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

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

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

It's Elemental: Samarium
- Basic physical and historical information.
- http://education.jlab.org/itselemental/ele062.html

ChemicalElements.com: Samarium
- Basic information, atomic structure, and isotopes table.
- http://www.chemicalelements.com/elements/sm.html

Visual Elements: Samarium
- Image, source, uses, physical information, and key isotopes.
- http://www.chemsoc.org/viselements/pages/samarium.html