See also:

• Science: Chemistry: Elements: Alkali Earth Metals  (1)

ChemGlobe: Strontium - Electronic, thermal, and steric data along with an isotope table..

ChemicalElements.com: Strontium - Basic information, atomic structure, and isotopes..

EnvironmentalChemistry.com: Strontium - Atomic structure, chemical and physical properties, and table of nuclides..

It's Elemental: Strontium - Basic physical and historical information..

LANL: Strontium - History, forms, properties, isotopes, and uses..

Lenntech: Strontium - Physical data, chemical properties, health and environmental effects..

USGS Minerals Information: Strontium - Statistics and information on the worldwide supply, demand, and flow of the element (PDF format)..

Visual Elements: Strontium - Uses, physical information, key isotopes, and ionisation energies..

WebElements: Strontium - Extensive information on history, uses, occurrence, compounds, and properties of the element..

Wikipedia: Strontium - Properties of the element, including its history, applications, and characteristics..