Samarium

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

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

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

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

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

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

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

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